diff --git a/src/ve/ucv/ciens/ccg/nxtar/NxtARCore.java b/src/ve/ucv/ciens/ccg/nxtar/NxtARCore.java
index 3d866b4..9ee47ef 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/NxtARCore.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/NxtARCore.java
@@ -30,6 +30,7 @@ import ve.ucv.ciens.ccg.nxtar.states.OuyaMainMenuState;
 import ve.ucv.ciens.ccg.nxtar.states.TabletMainMenuState;
 import ve.ucv.ciens.ccg.nxtar.utils.GameSettings;
 import ve.ucv.ciens.ccg.nxtar.utils.ProjectConstants;
+import ve.ucv.ciens.ccg.nxtar.utils.Utils;
 import aurelienribon.tweenengine.Tween;
 import aurelienribon.tweenengine.TweenEquations;
 import aurelienribon.tweenengine.primitives.MutableFloat;
@@ -51,7 +52,7 @@ import com.badlogic.gdx.graphics.glutils.ShaderProgram;
 /**
  * <p>Core of the application.</p>
  * 
- * <p>This class has three basic resposibilities:</p>
+ * <p>This class has three basic responsibilities:</p>
  * <ul>
  *     <li> Handling the main game loop.</li>
  *     <li> Starting and destroying the networking threads.</li>
@@ -255,8 +256,8 @@ public class NxtARCore extends Game implements ApplicationEventsListener{
 		ShaderProgram.pedantic = false;
 
 		// Set up the overlay font.
-		overlayX = -((Gdx.graphics.getWidth() * ProjectConstants.OVERSCAN) / 2) + 10;
-		overlayY = ((Gdx.graphics.getHeight() * ProjectConstants.OVERSCAN) / 2) - 10;
+		overlayX = -(Utils.getScreenWidth() / 2) + 10;
+		overlayY = (Utils.getScreenHeight() / 2) - 10;
 
 		font = new BitmapFont();
 		font.setColor(1.0f, 1.0f, 0.0f, 1.0f);
@@ -392,6 +393,8 @@ public class NxtARCore extends Game implements ApplicationEventsListener{
 			font.draw(batch, String.format("Lost stream FPS: %d", videoThread.getLostFrames()), overlayX, overlayY - (2 * font.getCapHeight()) - 10);
 			font.draw(batch, String.format("Light sensor data: %d", sensorThread.getLightSensorReading()), overlayX, overlayY - (3 * font.getCapHeight()) - 15);
 			font.draw(batch, String.format("Device roll: %f", Gdx.input.getRoll()), overlayX, overlayY - (4 * font.getCapHeight()) - 20);
+			font.draw(batch, String.format("Device pitch: %f", Gdx.input.getPitch()), overlayX, overlayY - (5 * font.getCapHeight()) - 25);
+			font.draw(batch, String.format("Device azimuth: %f", Gdx.input.getAzimuth()), overlayX, overlayY - (6 * font.getCapHeight()) - 30);
 		}batch.end();
 	}
 
diff --git a/src/ve/ucv/ciens/ccg/nxtar/components/BombGamePlayerComponent.java b/src/ve/ucv/ciens/ccg/nxtar/components/BombGamePlayerComponent.java
new file mode 100644
index 0000000..82144ed
--- /dev/null
+++ b/src/ve/ucv/ciens/ccg/nxtar/components/BombGamePlayerComponent.java
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2014 Miguel Angel Astor Romero
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ve.ucv.ciens.ccg.nxtar.components;
+
+public class BombGamePlayerComponent extends PlayerComponentBase {
+	public static final int MIN_LIVES = 1;
+	public static final int MAX_LIVES = 5;
+
+	private int startingLives;
+	public  int     lives;
+	public  int     disabledBombs;
+
+	public BombGamePlayerComponent(int lives) throws IllegalArgumentException{
+		super();
+
+		if(lives < MIN_LIVES || lives > MAX_LIVES)
+			throw new IllegalArgumentException("Lives number out of range: " + Integer.toString(lives));
+
+		startingLives = lives;
+		reset();
+	}
+
+	public BombGamePlayerComponent(){
+		this(3);
+	}
+	
+	@Override
+	public void reset(){
+		super.reset();
+
+		this.lives = startingLives;
+		this.disabledBombs = 0;
+	}
+}
diff --git a/src/ve/ucv/ciens/ccg/nxtar/components/PlayerComponentBase.java b/src/ve/ucv/ciens/ccg/nxtar/components/PlayerComponentBase.java
new file mode 100644
index 0000000..008f6f0
--- /dev/null
+++ b/src/ve/ucv/ciens/ccg/nxtar/components/PlayerComponentBase.java
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2014 Miguel Angel Astor Romero
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ve.ucv.ciens.ccg.nxtar.components;
+
+import com.artemis.Component;
+
+/**
+ * Tag class.
+ */
+public abstract class PlayerComponentBase extends Component {
+	public static final String PLAYER_GROUP = "PLAYER";
+
+	public boolean gameFinished;
+	public boolean victory;
+
+	public PlayerComponentBase(){
+		this.gameFinished = false;
+		this.victory = false;
+	}
+
+	public void reset(){
+		this.gameFinished = false;
+		this.victory = false;
+	}
+}
diff --git a/src/ve/ucv/ciens/ccg/nxtar/entities/BombGameEntityCreator.java b/src/ve/ucv/ciens/ccg/nxtar/entities/BombGameEntityCreator.java
index 030c03e..d95079b 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/entities/BombGameEntityCreator.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/entities/BombGameEntityCreator.java
@@ -15,11 +15,15 @@
  */
 package ve.ucv.ciens.ccg.nxtar.entities;
 
+import java.util.LinkedList;
+import java.util.List;
+
 import ve.ucv.ciens.ccg.nxtar.components.AnimationComponent;
 import ve.ucv.ciens.ccg.nxtar.components.AutomaticMovementComponent;
 import ve.ucv.ciens.ccg.nxtar.components.BombComponent;
 import ve.ucv.ciens.ccg.nxtar.components.BombComponent.bomb_type_t;
 import ve.ucv.ciens.ccg.nxtar.components.BombGameObjectTypeComponent;
+import ve.ucv.ciens.ccg.nxtar.components.BombGamePlayerComponent;
 import ve.ucv.ciens.ccg.nxtar.components.CollisionDetectionComponent;
 import ve.ucv.ciens.ccg.nxtar.components.CollisionModelComponent;
 import ve.ucv.ciens.ccg.nxtar.components.EnvironmentComponent;
@@ -57,6 +61,7 @@ public class BombGameEntityCreator extends EntityCreatorBase{
 	public static final Vector3  ROBOT_ARM_START_POINT                       = new Vector3(0.0f, 0.0f, -1.0f);
 	public static final int      DOOR_OPEN_ANIMATION                         = 1;
 	public static final int      DOOR_CLOSE_ANIMATION                        = 0;
+	public static       int      NUM_BOMBS                                   = 0;
 
 	private class EntityParameters{
 		public Environment environment;
@@ -77,6 +82,8 @@ public class BombGameEntityCreator extends EntityCreatorBase{
 	private Shader       shader;
 	private int          currentBombId;
 	private GroupManager groupManager;
+	private List<Entity> entities;
+	private Entity       player;
 
 	// Render models.
 	private Model  robotArmModel                       = null;
@@ -114,6 +121,17 @@ public class BombGameEntityCreator extends EntityCreatorBase{
 	public BombGameEntityCreator(){
 		currentBombId = 0;
 		manager = new AssetManager();
+		entities = new LinkedList<Entity>();
+		player = null;
+
+		// Load the shader.
+		shader = new DirectionalLightPerPixelShader();
+		try{
+			shader.init();
+		}catch(GdxRuntimeException gdx){
+			Gdx.app.error(TAG, CLASS_NAME + ".BombGameEntityCreator(): Shader failed to load: " + gdx.getMessage());
+			shader = null;
+		}
 
 		// Load the render models.
 		manager.load("models/render_models/bomb_game/robot_arm.g3db", Model.class);
@@ -166,15 +184,6 @@ public class BombGameEntityCreator extends EntityCreatorBase{
 		parameters = new EntityParameters();
 		parameters.environment.set(new ColorAttribute(ColorAttribute.AmbientLight, 0.3f, 0.3f, 0.3f, 1.0f));
 		parameters.environment.add(new DirectionalLight().set(new Color(1, 1, 1, 1), new Vector3(0, 0, -1)));
-
-		// Load the shader.
-		shader = new DirectionalLightPerPixelShader();
-		try{
-			shader.init();
-		}catch(GdxRuntimeException gdx){
-			Gdx.app.error(TAG, CLASS_NAME + ".BombGameEntityCreator(): Shader failed to load: " + gdx.getMessage());
-			shader = null;
-		}
 		parameters.shader = shader;
 
 		addRobotArm(parameters);
@@ -207,6 +216,16 @@ public class BombGameEntityCreator extends EntityCreatorBase{
 		monkey.addComponent(new ShaderComponent(shader));
 		monkey.addComponent(new EnvironmentComponent(parameters.environment));
 		monkey.addToWorld();
+		entities.add(monkey);
+
+		// Create the player.
+		if(player == null){
+			player = world.createEntity();
+			player.addComponent(new BombGamePlayerComponent(3));
+			player.addToWorld();
+		}else{
+			player.getComponent(BombGamePlayerComponent.class).reset();
+		}
 
 		entitiesCreated = true;
 	}
@@ -245,6 +264,7 @@ public class BombGameEntityCreator extends EntityCreatorBase{
 		robotArm.addComponent(new CollisionDetectionComponent());
 		robotArm.addComponent(new AutomaticMovementComponent());
 		robotArm.addToWorld();
+		entities.add(robotArm);
 	}
 
 	private void addBomb(EntityParameters parameters, bomb_type_t type) throws IllegalArgumentException{
@@ -288,7 +308,9 @@ public class BombGameEntityCreator extends EntityCreatorBase{
 		// Add the bomb and increase the id for the next one.
 		//groupManager.add(bomb, CollisionDetectionSystem.COLLIDABLE_OBJECT);
 		bomb.addToWorld();
+		entities.add(bomb);
 		currentBombId++;
+		NUM_BOMBS++;
 	}
 
 	private void addBombCombinationButtons(EntityParameters parameters, BombComponent bomb){
@@ -353,6 +375,8 @@ public class BombGameEntityCreator extends EntityCreatorBase{
 		if(DEBUG_RENDER_PARAPHERNALIA_COLLISION_MODELS)
 			addDebugCollisionModelRenderingEntity(collisionModel, parameters, false);
 
+		entities.add(thing);
+
 		return thing;
 	}
 
@@ -391,6 +415,9 @@ public class BombGameEntityCreator extends EntityCreatorBase{
 		groupManager.add(door, DOORS_GROUP);
 		door.addToWorld();
 
+		entities.add(frame);
+		entities.add(door);
+
 		if(DEBUG_RENDER_DOOR_COLLISION_MODELS){
 			addDebugCollisionModelRenderingEntity(doorFrameCollisionModel, parameters, false);
 			addDebugCollisionModelRenderingEntity(doorCollisionModel, parameters, true);
@@ -413,6 +440,7 @@ public class BombGameEntityCreator extends EntityCreatorBase{
 			thing.addComponent(new AnimationComponent(instance, parameters.nextAnimation, parameters.loopAnimation));
 		}
 		thing.addToWorld();
+		entities.add(thing);
 	}
 
 	private void getModels(){
@@ -455,4 +483,19 @@ public class BombGameEntityCreator extends EntityCreatorBase{
 		wiresBombCollisionModelWire2        = manager.get("models/collision_models/bomb_game/cable_2_col.g3db", Model.class);
 		wiresBombCollisionModelWire3        = manager.get("models/collision_models/bomb_game/cable_3_col.g3db", Model.class);
 	}
+
+	@Override
+	public void resetAllEntities() {
+		for(Entity entity : entities){
+			try{
+				if(entity.isActive())
+					entity.deleteFromWorld();
+			}catch(NullPointerException n){
+				Gdx.app.error(TAG, CLASS_NAME + ".resetAllEntities(): Null pointer exception while deleting entity.");
+			}
+		}
+		entities.clear();
+		NUM_BOMBS = 0;
+		createAllEntities();
+	}
 }
diff --git a/src/ve/ucv/ciens/ccg/nxtar/entities/EntityCreatorBase.java b/src/ve/ucv/ciens/ccg/nxtar/entities/EntityCreatorBase.java
index 8063e26..0d32630 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/entities/EntityCreatorBase.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/entities/EntityCreatorBase.java
@@ -78,4 +78,9 @@ public abstract class EntityCreatorBase implements Disposable{
 	 * <p>Creates all entities for a game scenario.</p>
 	 */
 	protected abstract void createAllEntities();
+
+	/**
+	 * <p>Recreates all entities in the game.</p>
+	 */
+	public abstract void resetAllEntities();
 }
diff --git a/src/ve/ucv/ciens/ccg/nxtar/entities/MarkerTestEntityCreator.java b/src/ve/ucv/ciens/ccg/nxtar/entities/MarkerTestEntityCreator.java
index 4f8eb81..afd0f8b 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/entities/MarkerTestEntityCreator.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/entities/MarkerTestEntityCreator.java
@@ -134,4 +134,7 @@ public class MarkerTestEntityCreator extends EntityCreatorBase {
 
 		return true;
 	}
+
+	@Override
+	public void resetAllEntities() { }
 }
diff --git a/src/ve/ucv/ciens/ccg/nxtar/input/GamepadUserInput.java b/src/ve/ucv/ciens/ccg/nxtar/input/GamepadUserInput.java
index 59b79d2..8e16006 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/input/GamepadUserInput.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/input/GamepadUserInput.java
@@ -20,11 +20,13 @@ public class GamepadUserInput extends UserInput {
 	public float        axisLeftY;
 	public float        axisRightX;
 	public float        axisRightY;
+	public boolean      oButton;
 
 	public GamepadUserInput(){
 		this.axisLeftX   = 0.0f;
 		this.axisLeftY   = 0.0f;
 		this.axisRightX  = 0.0f;
 		this.axisRightY  = 0.0f;
+		this.oButton     = false;
 	}
 }
diff --git a/src/ve/ucv/ciens/ccg/nxtar/input/KeyboardUserInput.java b/src/ve/ucv/ciens/ccg/nxtar/input/KeyboardUserInput.java
index 31949ea..3c2c6d7 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/input/KeyboardUserInput.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/input/KeyboardUserInput.java
@@ -20,15 +20,13 @@ public class KeyboardUserInput extends UserInput {
 	public boolean      keyRight;
 	public boolean      keyUp;
 	public boolean      keyDown;
-	public boolean      keyA;
-	public boolean      keyZ;
-	
+	public boolean      keySpace;
+
 	public KeyboardUserInput(){
 		this.keyLeft     = false;
 		this.keyRight    = false;
 		this.keyUp       = false;
 		this.keyDown     = false;
-		this.keyA        = false;
-		this.keyZ        = false;
+		this.keySpace    = false;
 	}
 }
diff --git a/src/ve/ucv/ciens/ccg/nxtar/input/TouchUserInput.java b/src/ve/ucv/ciens/ccg/nxtar/input/TouchUserInput.java
index 4143d0b..221da6c 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/input/TouchUserInput.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/input/TouchUserInput.java
@@ -18,7 +18,7 @@ package ve.ucv.ciens.ccg.nxtar.input;
 import com.badlogic.gdx.math.Vector3;
 
 public class TouchUserInput extends UserInput {
-	public Vector3          userTouchEndPoint;
+	public Vector3 userTouchEndPoint;
 
 	public TouchUserInput(){
 		this.userTouchEndPoint = new Vector3();
diff --git a/src/ve/ucv/ciens/ccg/nxtar/states/InGameState.java b/src/ve/ucv/ciens/ccg/nxtar/states/InGameState.java
index c9fc8bb..bbdd025 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/states/InGameState.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/states/InGameState.java
@@ -25,7 +25,6 @@ import ve.ucv.ciens.ccg.nxtar.input.KeyboardUserInput;
 import ve.ucv.ciens.ccg.nxtar.input.TouchUserInput;
 import ve.ucv.ciens.ccg.nxtar.input.UserInput;
 import ve.ucv.ciens.ccg.nxtar.interfaces.ImageProcessor.MarkerData;
-import ve.ucv.ciens.ccg.nxtar.network.SensorReportThread;
 import ve.ucv.ciens.ccg.nxtar.network.monitors.MotorEventQueue;
 import ve.ucv.ciens.ccg.nxtar.network.monitors.VideoFrameMonitor;
 import ve.ucv.ciens.ccg.nxtar.systems.AnimationSystem;
@@ -38,6 +37,7 @@ import ve.ucv.ciens.ccg.nxtar.systems.ObjectRenderingSystem;
 import ve.ucv.ciens.ccg.nxtar.systems.RobotArmPositioningSystem;
 import ve.ucv.ciens.ccg.nxtar.utils.GameSettings;
 import ve.ucv.ciens.ccg.nxtar.utils.ProjectConstants;
+import ve.ucv.ciens.ccg.nxtar.utils.Utils;
 
 import com.artemis.World;
 import com.badlogic.gdx.Gdx;
@@ -63,7 +63,7 @@ public class InGameState extends BaseState{
 	private static final String  TAG                    = "IN_GAME_STATE";
 	private static final String  CLASS_NAME             = InGameState.class.getSimpleName();
 	private static final String  BACKGROUND_SHADER_PATH = "shaders/bckg/bckg";
-	private static final String  ALPHA_SHADER_PREFIX    = "shaders/alphaSprite/alpha";
+	//	private static final String  ALPHA_SHADER_PREFIX    = "shaders/alphaSprite/alpha";
 	private static final float   NEAR                   = 0.01f;
 	private static final float   FAR                    = 100.0f;
 
@@ -94,9 +94,9 @@ public class InGameState extends BaseState{
 	private ModelBatch                      modelBatch;
 	private FrameBuffer                     frameBuffer;
 	private Sprite                          frameBufferSprite;
-	private FrameBuffer                     robotArmFrameBuffer;
-	private Sprite                          robotArmFrameBufferSprite;
-	private ShaderProgram                   alphaShader;
+	//	private FrameBuffer                     robotArmFrameBuffer;
+	//	private Sprite                          robotArmFrameBufferSprite;
+	//	private ShaderProgram                   alphaShader;
 
 	// Game related fields.
 	private World                           gameWorld;
@@ -116,18 +116,27 @@ public class InGameState extends BaseState{
 	private Sprite                          renderableVideoFrame;
 	private Pixmap                          videoFrame;
 
-	// Interface buttons.
-	private Texture                         mainControlButtonTexture;
+	// Gui textures.
+	private Texture                         upControlButtonTexture;
+	private Texture                         downControlButtonTexture;
+	private Texture                         leftControlButtonTexture;
+	private Texture                         rightControlButtonTexture;
 	private Texture                         headControlButtonTexture;
 	private Texture                         wheelControlButtonTexture;
 	private Texture                         armControlButtonTexture;
 	private Texture                         correctAngleLedOnTexture;
 	private Texture                         correctAngleLedOffTexture;
 	private Texture                         crossSectionFloorTexture;
+
+	// Gui renderable sprites.
 	private Sprite                          motorAButton;
 	private Sprite                          motorBButton;
 	private Sprite                          motorCButton;
 	private Sprite                          motorDButton;
+	private Sprite                          armAButton;
+	private Sprite                          armBButton;
+	private Sprite                          armCButton;
+	private Sprite                          armDButton;
 	private Sprite                          headAButton;
 	private Sprite                          headBButton;
 	private Sprite                          headCButton;
@@ -147,14 +156,14 @@ public class InGameState extends BaseState{
 	// Monitors.
 	private VideoFrameMonitor               frameMonitor;
 	private MotorEventQueue                 queue;
-	private SensorReportThread              sensorThread;
+	//	private SensorReportThread              sensorThread;
 
 	public InGameState(final NxtARCore core){
 		this.core = core;
 		frameMonitor = VideoFrameMonitor.getInstance();
 		queue = MotorEventQueue.getInstance();
 		controlMode = robot_control_mode_t.WHEEL_CONTROL;
-		sensorThread = SensorReportThread.getInstance();
+		//		sensorThread = SensorReportThread.getInstance();
 
 		// Set up rendering fields;
 		videoFrame = null;
@@ -217,20 +226,20 @@ public class InGameState extends BaseState{
 		uScaling[1] = Gdx.graphics.getHeight() > Gdx.graphics.getWidth() ? 16.0f : 9.0f;
 
 		// Set up the alpha shader.
-		alphaShader = new ShaderProgram(Gdx.files.internal(ALPHA_SHADER_PREFIX + "_vert.glsl"), Gdx.files.internal(ALPHA_SHADER_PREFIX + "_frag.glsl"));
-		if(!alphaShader.isCompiled()){
-			Gdx.app.error(TAG, CLASS_NAME + ".InGameState() :: Failed to compile the alpha shader.");
-			Gdx.app.error(TAG, CLASS_NAME + alphaShader.getLog());
-			alphaShader = null;
-		}
+		//		alphaShader = new ShaderProgram(Gdx.files.internal(ALPHA_SHADER_PREFIX + "_vert.glsl"), Gdx.files.internal(ALPHA_SHADER_PREFIX + "_frag.glsl"));
+		//		if(!alphaShader.isCompiled()){
+		//			Gdx.app.error(TAG, CLASS_NAME + ".InGameState() :: Failed to compile the alpha shader.");
+		//			Gdx.app.error(TAG, CLASS_NAME + alphaShader.getLog());
+		//			alphaShader = null;
+		//		}
 
 		// Set up the 3D rendering.
 		modelBatch = new ModelBatch();
 		frameBuffer = null;
 		perspectiveCamera = null;
 		frameBufferSprite = null;
-		robotArmFrameBuffer = null;
-		robotArmFrameBufferSprite = null;
+		//		robotArmFrameBuffer = null;
+		//		robotArmFrameBufferSprite = null;
 
 		// Set up floor leds and possibly the buttons.
 		correctAngleLedOnTexture  = new Texture(Gdx.files.internal("data/gfx/gui/Anonymous_Button_Green.png"));
@@ -245,9 +254,9 @@ public class InGameState extends BaseState{
 		normalFloorLed.setSize(normalFloorLed.getWidth() * 0.25f, normalFloorLed.getHeight() * 0.25f);
 		itemNearbyFloorLed.setSize(itemNearbyFloorLed.getWidth() * 0.25f, itemNearbyFloorLed.getHeight() * 0.25f);
 
-		crossSectionFloorLed.setPosition(-(crossSectionFloorLed.getWidth() / 2), Gdx.graphics.getHeight() / 2 - crossSectionFloorLed.getHeight() - 5);
-		normalFloorLed.setPosition(-(normalFloorLed.getWidth() / 2), Gdx.graphics.getHeight() / 2 - normalFloorLed.getHeight() - 5);
-		itemNearbyFloorLed.setPosition(-(itemNearbyFloorLed.getWidth() / 2), Gdx.graphics.getHeight() / 2 - itemNearbyFloorLed.getHeight() - 5);
+		crossSectionFloorLed.setPosition(-(crossSectionFloorLed.getWidth() / 2), (Utils.getScreenHeight() / 2) - crossSectionFloorLed.getHeight() - 5);
+		normalFloorLed.setPosition(-(normalFloorLed.getWidth() / 2), (Utils.getScreenHeight() / 2) - normalFloorLed.getHeight() - 5);
+		itemNearbyFloorLed.setPosition(-(itemNearbyFloorLed.getWidth() / 2), (Utils.getScreenHeight() / 2) - itemNearbyFloorLed.getHeight() - 5);
 
 		if(!Ouya.runningOnOuya)
 			setUpButtons();
@@ -310,8 +319,8 @@ public class InGameState extends BaseState{
 			frameBuffer = new FrameBuffer(Format.RGBA8888, w, h, true);
 			frameBuffer.getColorBufferTexture().setFilter(TextureFilter.Linear, TextureFilter.Linear);
 
-			robotArmFrameBuffer = new FrameBuffer(Format.RGBA8888, w, h, true);
-			robotArmFrameBuffer.getColorBufferTexture().setFilter(TextureFilter.Linear, TextureFilter.Linear);
+			//			robotArmFrameBuffer = new FrameBuffer(Format.RGBA8888, w, h, true);
+			//			robotArmFrameBuffer.getColorBufferTexture().setFilter(TextureFilter.Linear, TextureFilter.Linear);
 
 			perspectiveCamera = new CustomPerspectiveCamera(67, w, h);
 			perspectiveCamera.translate(0.0f, 0.0f, 0.0f);
@@ -365,19 +374,25 @@ public class InGameState extends BaseState{
 				markerRenderingSystem.begin(perspectiveCamera);
 				markerRenderingSystem.process();
 				markerRenderingSystem.end();
+
+				if(controlMode.getValue() == robot_control_mode_t.ARM_CONTROL.getValue() || Ouya.runningOnOuya){
+					objectRenderingSystem.begin(perspectiveCamera);
+					objectRenderingSystem.process();
+					objectRenderingSystem.end();
+				}
 			}frameBuffer.end();
 
-			robotArmFrameBuffer.begin();{
-				// Set OpenGL state.
-				Gdx.gl.glClearColor(0, 0, 0, 0);
-				Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);
-				Gdx.gl.glDisable(GL20.GL_TEXTURE_2D);
-
-				// Call rendering systems.
-				objectRenderingSystem.begin(perspectiveCamera);
-				objectRenderingSystem.process();
-				objectRenderingSystem.end();
-			}robotArmFrameBuffer.end();
+			//			robotArmFrameBuffer.begin();{
+			//				// Set OpenGL state.
+			//				Gdx.gl.glClearColor(0, 0, 0, 0);
+			//				Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);
+			//				Gdx.gl.glDisable(GL20.GL_TEXTURE_2D);
+			//
+			//				// Call rendering systems.
+			//				objectRenderingSystem.begin(perspectiveCamera);
+			//				objectRenderingSystem.process();
+			//				objectRenderingSystem.end();
+			//			}robotArmFrameBuffer.end();
 
 			// Set the frame buffer object texture to a renderable sprite.
 			region = new TextureRegion(frameBuffer.getColorBufferTexture(), 0, 0, frameBuffer.getWidth(), frameBuffer.getHeight());
@@ -390,14 +405,14 @@ public class InGameState extends BaseState{
 			frameBufferSprite.setPosition(0, 0);
 
 			// Set the other frame buffer object texture to a renderable sprite.
-			region = new TextureRegion(robotArmFrameBuffer.getColorBufferTexture(), 0, 0, robotArmFrameBuffer.getWidth(), robotArmFrameBuffer.getHeight());
-			region.flip(false, true);
-			if(robotArmFrameBufferSprite == null)
-				robotArmFrameBufferSprite = new Sprite(region);
-			else
-				robotArmFrameBufferSprite.setRegion(region);
-			robotArmFrameBufferSprite.setOrigin(robotArmFrameBuffer.getWidth() / 2, robotArmFrameBuffer.getHeight() / 2);
-			robotArmFrameBufferSprite.setPosition(0, 0);
+			//			region = new TextureRegion(robotArmFrameBuffer.getColorBufferTexture(), 0, 0, robotArmFrameBuffer.getWidth(), robotArmFrameBuffer.getHeight());
+			//			region.flip(false, true);
+			//			if(robotArmFrameBufferSprite == null)
+			//				robotArmFrameBufferSprite = new Sprite(region);
+			//			else
+			//				robotArmFrameBufferSprite.setRegion(region);
+			//			robotArmFrameBufferSprite.setOrigin(robotArmFrameBuffer.getWidth() / 2, robotArmFrameBuffer.getHeight() / 2);
+			//			robotArmFrameBufferSprite.setPosition(0, 0);
 
 			// Set the position and orientation of the renderable video frame and the frame buffer.
 			if(!Ouya.runningOnOuya){
@@ -409,22 +424,22 @@ public class InGameState extends BaseState{
 				frameBufferSprite.rotate90(true);
 				frameBufferSprite.translate(-frameBufferSprite.getWidth() / 2, 0.5f - frameBufferSprite.getHeight());
 
-				robotArmFrameBufferSprite.setSize(1.0f, robotArmFrameBufferSprite.getHeight() / robotArmFrameBufferSprite.getWidth() );
-				robotArmFrameBufferSprite.rotate90(true);
-				robotArmFrameBufferSprite.translate(-robotArmFrameBufferSprite.getWidth() / 2, 0.5f - robotArmFrameBufferSprite.getHeight());
+				//				robotArmFrameBufferSprite.setSize(1.0f, robotArmFrameBufferSprite.getHeight() / robotArmFrameBufferSprite.getWidth() );
+				//				robotArmFrameBufferSprite.rotate90(true);
+				//				robotArmFrameBufferSprite.translate(-robotArmFrameBufferSprite.getWidth() / 2, 0.5f - robotArmFrameBufferSprite.getHeight());
 			}else{
 				float xSize = Gdx.graphics.getHeight() * (w / h);
-				renderableVideoFrame.setSize(xSize * ProjectConstants.OVERSCAN, Gdx.graphics.getHeight() * ProjectConstants.OVERSCAN);
+				renderableVideoFrame.setSize(xSize * ProjectConstants.OVERSCAN, Utils.getScreenHeight());
 				renderableVideoFrame.rotate90(true);
 				renderableVideoFrame.translate(-renderableVideoFrame.getWidth() / 2, -renderableVideoFrame.getHeight() / 2);
 
-				frameBufferSprite.setSize(xSize * ProjectConstants.OVERSCAN, Gdx.graphics.getHeight() * ProjectConstants.OVERSCAN);
+				frameBufferSprite.setSize(xSize * ProjectConstants.OVERSCAN, Utils.getScreenHeight());
 				frameBufferSprite.rotate90(true);
 				frameBufferSprite.translate(-frameBufferSprite.getWidth() / 2, -frameBufferSprite.getHeight() / 2);
 
-				robotArmFrameBufferSprite.setSize(xSize * ProjectConstants.OVERSCAN, Gdx.graphics.getHeight() * ProjectConstants.OVERSCAN);
-				robotArmFrameBufferSprite.rotate90(true);
-				robotArmFrameBufferSprite.translate(-robotArmFrameBufferSprite.getWidth() / 2, -robotArmFrameBufferSprite.getHeight() / 2);
+				//				robotArmFrameBufferSprite.setSize(xSize * ProjectConstants.OVERSCAN, Gdx.graphics.getHeight() * ProjectConstants.OVERSCAN);
+				//				robotArmFrameBufferSprite.rotate90(true);
+				//				robotArmFrameBufferSprite.translate(-robotArmFrameBufferSprite.getWidth() / 2, -robotArmFrameBufferSprite.getHeight() / 2);
 			}
 
 			// Set the correct camera for the device.
@@ -439,11 +454,14 @@ public class InGameState extends BaseState{
 				renderableVideoFrame.draw(core.batch);
 				frameBufferSprite.draw(core.batch);
 
-				if(alphaShader != null){
-					core.batch.setShader(alphaShader);
-				}
-				robotArmFrameBufferSprite.draw(core.batch);
-				if(alphaShader != null) core.batch.setShader(null);
+				// Render the robot arm only when in the corresponding control mode. Always render it on the OUYA.
+				//				if(controlMode.getValue() == robot_control_mode_t.ARM_CONTROL.getValue() || Ouya.runningOnOuya){
+				//					if(alphaShader != null){
+				//						core.batch.setShader(alphaShader);
+				//					}
+				//					robotArmFrameBufferSprite.draw(core.batch);
+				//					if(alphaShader != null) core.batch.setShader(null);
+				//				}
 
 			}core.batch.end();
 
@@ -455,41 +473,40 @@ public class InGameState extends BaseState{
 		if(!Ouya.runningOnOuya){
 			core.batch.setProjectionMatrix(pixelPerfectOrthographicCamera.combined);
 			core.batch.begin();{
-				motorAButton.draw(core.batch);
-				motorBButton.draw(core.batch);
-				motorCButton.draw(core.batch);
-				motorDButton.draw(core.batch);
-				headAButton.draw(core.batch);
-				headBButton.draw(core.batch);
-				headCButton.draw(core.batch);
-
+				// Draw control mode button.
 				if(controlMode.getValue() == robot_control_mode_t.WHEEL_CONTROL.getValue()){
-					armControlButton.draw(core.batch);
-				}else if(controlMode.getValue() == robot_control_mode_t.ARM_CONTROL.getValue()){
+					// Draw motor control buttons.
+					motorAButton.draw(core.batch);
+					motorBButton.draw(core.batch);
+					motorCButton.draw(core.batch);
+					motorDButton.draw(core.batch);
 					wheelControlButton.draw(core.batch);
+				}else if(controlMode.getValue() == robot_control_mode_t.ARM_CONTROL.getValue()){
+					// Draw arm control buttons.
+					armAButton.draw(core.batch);
+					armBButton.draw(core.batch);
+					armCButton.draw(core.batch);
+					armDButton.draw(core.batch);
+					armControlButton.draw(core.batch);
 				}else{
 					throw new IllegalStateException("Unrecognized control mode: " + Integer.toString(controlMode.getValue()));
 				}
 
-				if(Math.abs(Gdx.input.getRoll()) < ProjectConstants.MAX_ABS_ROLL){
+				headAButton.draw(core.batch);
+				headBButton.draw(core.batch);
+				headCButton.draw(core.batch);
+
+				// Draw device rotation led.
+				if(Utils.isDeviceRollValid() && Math.abs(Gdx.input.getRoll()) < ProjectConstants.MAX_ABS_ROLL){
 					correctAngleLedOnSprite.draw(core.batch);
 				}else{
 					correctAngleLedOffSprite.draw(core.batch);
 				}
+
+				// TODO: Draw rotation slider.
 			}core.batch.end();
 		}
 
-		core.batch.setProjectionMatrix(pixelPerfectOrthographicCamera.combined);
-		core.batch.begin();{
-			if(sensorThread.getLightSensorReading() < 40){
-				normalFloorLed.draw(core.batch);
-			}else if(sensorThread.getLightSensorReading() >= 40 && sensorThread.getLightSensorReading() <= 80){
-				itemNearbyFloorLed.draw(core.batch);
-			}else{
-				crossSectionFloorLed.draw(core.batch);
-			}
-		}core.batch.end();
-
 		fadeEffectRenderingSystem.process();
 
 		data = null;
@@ -497,17 +514,23 @@ public class InGameState extends BaseState{
 
 	@Override
 	public void dispose(){
-		SensorReportThread.freeInstance();
-		sensorThread = null;
-
 		if(modelBatch != null)
 			modelBatch.dispose();
 
 		if(videoFrameTexture != null)
 			videoFrameTexture.dispose();
 
-		if(mainControlButtonTexture != null)
-			mainControlButtonTexture.dispose();
+		if(upControlButtonTexture != null)
+			upControlButtonTexture.dispose();
+
+		if(downControlButtonTexture != null)
+			downControlButtonTexture.dispose();
+
+		if(leftControlButtonTexture != null)
+			leftControlButtonTexture.dispose();
+
+		if(rightControlButtonTexture != null)
+			rightControlButtonTexture.dispose();
 
 		if(headControlButtonTexture != null)
 			headControlButtonTexture.dispose();
@@ -527,14 +550,11 @@ public class InGameState extends BaseState{
 		if(backgroundShader != null)
 			backgroundShader.dispose();
 
-		if(alphaShader != null)
-			alphaShader.dispose();
-
 		if(frameBuffer != null)
 			frameBuffer.dispose();
 
-		if(robotArmFrameBuffer != null)
-			robotArmFrameBuffer.dispose();
+		//		if(robotArmFrameBuffer != null)
+		//			robotArmFrameBuffer.dispose();
 
 		if(correctAngleLedOffTexture != null)
 			correctAngleLedOffTexture.dispose();
@@ -567,21 +587,22 @@ public class InGameState extends BaseState{
 
 	private void setUpButtons(){
 		// Set the main control buttons.
-		mainControlButtonTexture = new Texture(Gdx.files.internal("data/gfx/gui/PBCrichton_Flat_Button.png"));
-		mainControlButtonTexture.setFilter(TextureFilter.Linear, TextureFilter.Linear);
+		upControlButtonTexture = new Texture(Gdx.files.internal("data/gfx/gui/up_button.png"));
+		downControlButtonTexture = new Texture(Gdx.files.internal("data/gfx/gui/down_button.png"));
+		leftControlButtonTexture = new Texture(Gdx.files.internal("data/gfx/gui/left_button.png"));
+		rightControlButtonTexture = new Texture(Gdx.files.internal("data/gfx/gui/right_button.png"));
 
-		TextureRegion region = new TextureRegion(mainControlButtonTexture, 0, 0, mainControlButtonTexture.getWidth(), mainControlButtonTexture.getHeight());
-
-		motorAButton = new Sprite(region);
+		// Set the motor control buttons.
+		motorAButton = new Sprite(upControlButtonTexture);
 		motorAButton.setSize(motorAButton.getWidth() * 0.7f, motorAButton.getHeight() * 0.7f);
 
-		motorBButton = new Sprite(region);
+		motorBButton = new Sprite(downControlButtonTexture);
 		motorBButton.setSize(motorBButton.getWidth() * 0.7f, motorBButton.getHeight() * 0.7f);
 
-		motorCButton = new Sprite(region);
+		motorCButton = new Sprite(downControlButtonTexture);
 		motorCButton.setSize(motorCButton.getWidth() * 0.7f, motorCButton.getHeight() * 0.7f);
 
-		motorDButton = new Sprite(region);
+		motorDButton = new Sprite(upControlButtonTexture);
 		motorDButton.setSize(motorDButton.getWidth() * 0.7f, motorDButton.getHeight() * 0.7f);
 
 		motorAButton.setPosition(-(Gdx.graphics.getWidth() / 2) + 10, -(Gdx.graphics.getHeight() / 2) + motorBButton.getHeight() + 20);
@@ -589,6 +610,24 @@ public class InGameState extends BaseState{
 		motorCButton.setPosition((Gdx.graphics.getWidth() / 2) - (1.5f * (motorDButton.getWidth())) - 20, -(Gdx.graphics.getHeight() / 2) + 10);
 		motorDButton.setPosition((Gdx.graphics.getWidth() / 2) - motorDButton.getWidth() - 10, -(Gdx.graphics.getHeight() / 2) + 20 + motorCButton.getHeight());
 
+		// Set up robot arm control buttons.
+		armAButton = new Sprite(upControlButtonTexture);
+		armAButton.setSize(armAButton.getWidth() * 0.7f, armAButton.getHeight() * 0.7f);
+
+		armBButton = new Sprite(leftControlButtonTexture);
+		armBButton.setSize(armBButton.getWidth() * 0.7f, armBButton.getHeight() * 0.7f);
+
+		armCButton = new Sprite(rightControlButtonTexture);
+		armCButton.setSize(armCButton.getWidth() * 0.7f, armCButton.getHeight() * 0.7f);
+
+		armDButton = new Sprite(downControlButtonTexture);
+		armDButton.setSize(armDButton.getWidth() * 0.7f, armDButton.getHeight() * 0.7f);
+
+		armAButton.setPosition(-(Gdx.graphics.getWidth() / 2) + 10, -(Gdx.graphics.getHeight() / 2) + armBButton.getHeight() + 20);
+		armBButton.setPosition(-(Gdx.graphics.getWidth() / 2) + 20 + (armAButton.getWidth() / 2), -(Gdx.graphics.getHeight() / 2) + 10);
+		armCButton.setPosition((Gdx.graphics.getWidth() / 2) - (1.5f * (armDButton.getWidth())) - 20, -(Gdx.graphics.getHeight() / 2) + 10);
+		armDButton.setPosition((Gdx.graphics.getWidth() / 2) - armDButton.getWidth() - 10, -(Gdx.graphics.getHeight() / 2) + 20 + armCButton.getHeight());
+
 		// Set the head control buttons.
 		headControlButtonTexture = new Texture(Gdx.files.internal("data/gfx/gui/orange_glowy_button.png"));
 
@@ -624,8 +663,8 @@ public class InGameState extends BaseState{
 		correctAngleLedOnSprite.setSize(correctAngleLedOnSprite.getWidth() * 0.25f, correctAngleLedOnSprite.getHeight() * 0.25f);
 		correctAngleLedOffSprite.setSize(correctAngleLedOffSprite.getWidth() * 0.25f, correctAngleLedOffSprite.getHeight() * 0.25f);
 
-		correctAngleLedOnSprite.setPosition(Gdx.graphics.getWidth() / 2 - correctAngleLedOnSprite.getWidth() - 5, Gdx.graphics.getHeight() / 2 - correctAngleLedOnSprite.getHeight() - 5);
-		correctAngleLedOffSprite.setPosition(Gdx.graphics.getWidth() / 2 - correctAngleLedOffSprite.getWidth() - 5, Gdx.graphics.getHeight() / 2 - correctAngleLedOffSprite.getHeight() - 5);
+		correctAngleLedOnSprite.setPosition((Gdx.graphics.getWidth() / 2) - correctAngleLedOnSprite.getWidth() - 5, (Gdx.graphics.getHeight() / 2) - correctAngleLedOnSprite.getHeight() - 5);
+		correctAngleLedOffSprite.setPosition((Gdx.graphics.getWidth() / 2) - correctAngleLedOffSprite.getWidth() - 5, (Gdx.graphics.getHeight() / 2) - correctAngleLedOffSprite.getHeight() - 5);
 	}
 
 	/*;;;;;;;;;;;;;;;;;;;;;;;;;;;
@@ -1099,13 +1138,9 @@ public class InGameState extends BaseState{
 			input = new KeyboardUserInput();
 			input.keyDown = true;
 			break;
-		case Input.Keys.A: 
+		case Input.Keys.SPACE: 
 			input = new KeyboardUserInput();
-			input.keyA = true;
-			break;
-		case Input.Keys.Z: 
-			input = new KeyboardUserInput();
-			input.keyZ = true;
+			input.keySpace = true;
 			break;
 		default: 
 			return false;
@@ -1145,13 +1180,9 @@ public class InGameState extends BaseState{
 			input = new KeyboardUserInput();
 			input.keyDown = false;
 			break;
-		case Input.Keys.A: 
+		case Input.Keys.SPACE: 
 			input = new KeyboardUserInput();
-			input.keyA = false;
-			break;
-		case Input.Keys.Z: 
-			input = new KeyboardUserInput();
-			input.keyZ = false;
+			input.keySpace = false;
 			break;
 		default: 
 			return false;
@@ -1171,7 +1202,8 @@ public class InGameState extends BaseState{
 
 	@Override
 	public boolean buttonDown(Controller controller, int buttonCode){
-		MotorEvent event;
+		MotorEvent       event;
+		GamepadUserInput userInput;
 
 		if(stateActive){
 			Gdx.app.log(TAG, CLASS_NAME + ".buttonDown() :: " + controller.getName() + " :: " + Integer.toString(buttonCode));
@@ -1244,6 +1276,12 @@ public class InGameState extends BaseState{
 				event.setPower((byte)0x00);
 				queue.addEvent(event);
 
+			}else if(buttonCode == Ouya.BUTTON_O){
+				userInput = new GamepadUserInput();
+				userInput.oButton = true;
+				robotArmPositioningSystem.setUserInput(userInput);
+				robotArmPositioningSystem.process();
+
 			}else if(buttonCode == Ouya.BUTTON_A){
 				core.nextState = game_states_t.MAIN_MENU;
 			}
diff --git a/src/ve/ucv/ciens/ccg/nxtar/states/MainMenuStateBase.java b/src/ve/ucv/ciens/ccg/nxtar/states/MainMenuStateBase.java
index 09098c4..60b6b5c 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/states/MainMenuStateBase.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/states/MainMenuStateBase.java
@@ -43,7 +43,7 @@ import com.badlogic.gdx.scenes.scene2d.utils.NinePatchDrawable;
 public abstract class MainMenuStateBase extends BaseState{
 	protected static final String TAG = "MAIN_MENU";
 	private static final String CLASS_NAME = MainMenuStateBase.class.getSimpleName();
-	private static final String SHADER_PATH = "shaders/bckg/bckg";
+	private static final String SHADER_PATH = "shaders/movingBckg/movingBckg";
 
 	protected final int NUM_MENU_BUTTONS = 2;
 
@@ -52,6 +52,7 @@ public abstract class MainMenuStateBase extends BaseState{
 	protected boolean cameraCalibrated;
 	protected boolean assetsLoaded;
 	private   float   u_scaling[];
+	private   float   u_displacement;
 
 	// Buttons and other gui components.
 	protected TextButton startButton;
@@ -168,6 +169,8 @@ public abstract class MainMenuStateBase extends BaseState{
 		u_scaling[0] = Gdx.graphics.getWidth() > Gdx.graphics.getHeight() ? 16.0f : 9.0f;
 		u_scaling[1] = Gdx.graphics.getHeight() > Gdx.graphics.getWidth() ? 16.0f : 9.0f;
 
+		u_displacement = 1.0f;
+
 		win2world = new Vector3(0.0f, 0.0f, 0.0f);
 		touchPointWorldCoords = new Vector2();
 		startButtonTouched = false;
@@ -200,9 +203,11 @@ public abstract class MainMenuStateBase extends BaseState{
 		if(backgroundShader != null){
 			batch.setShader(backgroundShader);
 			backgroundShader.setUniform2fv("u_scaling", u_scaling, 0, 2);
+			backgroundShader.setUniformf("u_displacement", u_displacement);
 		}
 		background.draw(batch);
 		if(backgroundShader != null) batch.setShader(null);
+		u_displacement = u_displacement < 0.0f ? 1.0f : u_displacement - 0.0005f;
 	}
 
 	@Override
diff --git a/src/ve/ucv/ciens/ccg/nxtar/states/OuyaMainMenuState.java b/src/ve/ucv/ciens/ccg/nxtar/states/OuyaMainMenuState.java
index a92ec4f..00e829c 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/states/OuyaMainMenuState.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/states/OuyaMainMenuState.java
@@ -17,6 +17,7 @@ package ve.ucv.ciens.ccg.nxtar.states;
 
 import ve.ucv.ciens.ccg.nxtar.NxtARCore;
 import ve.ucv.ciens.ccg.nxtar.NxtARCore.game_states_t;
+import ve.ucv.ciens.ccg.nxtar.utils.Utils;
 
 import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.controllers.Controller;
@@ -47,7 +48,7 @@ public class OuyaMainMenuState extends MainMenuStateBase{
 		calibrationButtonBBox.setPosition(calibrationButton.getX(), calibrationButton.getY());
 
 		//Set leds.
-		ledYPos = (-(Gdx.graphics.getHeight() / 2) * 0.5f) + (calibrationButton.getY() * 0.5f);
+		ledYPos = (-(Utils.getScreenHeight() / 2) * 0.5f) + (calibrationButton.getY() * 0.5f);
 		cameraCalibratedLedOn.setSize(cameraCalibratedLedOn.getWidth() * 0.5f, cameraCalibratedLedOn.getHeight() * 0.5f);
 		cameraCalibratedLedOn.setPosition(-cameraCalibratedLedOn.getWidth() - 5, ledYPos);
 		cameraCalibratedLedOff.setSize(cameraCalibratedLedOff.getWidth() * 0.5f, cameraCalibratedLedOff.getHeight() * 0.5f);
@@ -118,6 +119,8 @@ public class OuyaMainMenuState extends MainMenuStateBase{
 				if(oButtonSelection == 0){
 					if(!clientConnected){
 						core.toast("Can't start the game. No client is connected.", true);
+					}else if(!core.cvProc.isCameraCalibrated()){
+						core.toast("Can't start the game. Camera is not calibrated.", true);
 					}else{
 						oButtonPressed = true;
 						startButton.setChecked(true);
@@ -158,7 +161,7 @@ public class OuyaMainMenuState extends MainMenuStateBase{
 						core.nextState = game_states_t.IN_GAME;
 					}else if(oButtonSelection == 1){
 						calibrationButton.setChecked(false);
-						core.nextState = game_states_t.IN_GAME;
+						core.nextState = game_states_t.CALIBRATION;
 					}
 				}
 			}
diff --git a/src/ve/ucv/ciens/ccg/nxtar/states/TabletMainMenuState.java b/src/ve/ucv/ciens/ccg/nxtar/states/TabletMainMenuState.java
index c9cc886..60e2f46 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/states/TabletMainMenuState.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/states/TabletMainMenuState.java
@@ -16,6 +16,7 @@
 package ve.ucv.ciens.ccg.nxtar.states;
 
 import ve.ucv.ciens.ccg.nxtar.NxtARCore;
+import ve.ucv.ciens.ccg.nxtar.utils.Utils;
 
 import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.graphics.GL20;
@@ -35,7 +36,7 @@ public class TabletMainMenuState extends MainMenuStateBase{
 		calibrationButtonBBox.setPosition(calibrationButton.getX(), calibrationButton.getY());
 
 		// Set leds.
-		ledYPos = (-(Gdx.graphics.getHeight() / 2) * 0.5f) + (calibrationButton.getY() * 0.5f);
+		ledYPos = (-(Utils.getScreenHeight() / 2) * 0.5f) + (calibrationButton.getY() * 0.5f);
 		cameraCalibratedLedOn.setSize(cameraCalibratedLedOn.getWidth() * 0.5f, cameraCalibratedLedOn.getHeight() * 0.5f);
 		cameraCalibratedLedOn.setPosition(-cameraCalibratedLedOn.getWidth() - 5, ledYPos);
 		cameraCalibratedLedOff.setSize(cameraCalibratedLedOff.getWidth() * 0.5f, cameraCalibratedLedOff.getHeight() * 0.5f);
diff --git a/src/ve/ucv/ciens/ccg/nxtar/systems/BombGameLogicSystem.java b/src/ve/ucv/ciens/ccg/nxtar/systems/BombGameLogicSystem.java
index 79eb391..6f7818d 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/systems/BombGameLogicSystem.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/systems/BombGameLogicSystem.java
@@ -23,6 +23,7 @@ import ve.ucv.ciens.ccg.nxtar.components.MarkerCodeComponent;
 import ve.ucv.ciens.ccg.nxtar.components.VisibilityComponent;
 import ve.ucv.ciens.ccg.nxtar.entities.BombGameEntityCreator;
 import ve.ucv.ciens.ccg.nxtar.utils.ProjectConstants;
+import ve.ucv.ciens.ccg.nxtar.utils.Utils;
 
 import com.artemis.Aspect;
 import com.artemis.ComponentMapper;
@@ -32,7 +33,6 @@ import com.artemis.annotations.Mapper;
 import com.artemis.managers.GroupManager;
 import com.artemis.utils.ImmutableBag;
 import com.badlogic.gdx.Gdx;
-import com.badlogic.gdx.Input.Peripheral;
 
 public class BombGameLogicSystem extends GameLogicSystemBase {
 	private static final String TAG        = "BOMB_GAME_LOGIC";
@@ -208,7 +208,6 @@ public class BombGameLogicSystem extends GameLogicSystemBase {
 		// Get the components of the big button.
 		CollisionDetectionComponent collision  = collisionMapper.getSafe(b);
 		MarkerCodeComponent         marker     = markerMapper.getSafe(b);
-		float angle;
 
 		// If any of the components is missing, skip this entity.
 		if(marker == null || collision == null ){
@@ -225,10 +224,7 @@ public class BombGameLogicSystem extends GameLogicSystemBase {
 				manager.remove(b, Integer.toString(marker.code));
 				b.deleteFromWorld();
 
-				angle = Gdx.input.getRoll();
-				Gdx.app.log("ROTATION", "Roll: " + Float.toString(angle));
-
-				if(Gdx.input.isPeripheralAvailable(Peripheral.Accelerometer) && Math.abs(angle) > ProjectConstants.MAX_ABS_ROLL){
+				if(Utils.isDeviceRollValid() && Math.abs(Gdx.input.getRoll()) > ProjectConstants.MAX_ABS_ROLL){
 					Gdx.app.log(TAG, CLASS_NAME + ".processInclinationBomb(): Inclination bomb exploded.");
 					createFadeOutEffect();
 				}
diff --git a/src/ve/ucv/ciens/ccg/nxtar/systems/BombGamePlayerSystem.java b/src/ve/ucv/ciens/ccg/nxtar/systems/BombGamePlayerSystem.java
new file mode 100644
index 0000000..e8cee15
--- /dev/null
+++ b/src/ve/ucv/ciens/ccg/nxtar/systems/BombGamePlayerSystem.java
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2013 Miguel Angel Astor Romero
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ve.ucv.ciens.ccg.nxtar.systems;
+
+import ve.ucv.ciens.ccg.nxtar.NxtARCore;
+import ve.ucv.ciens.ccg.nxtar.components.BombGamePlayerComponent;
+import ve.ucv.ciens.ccg.nxtar.entities.BombGameEntityCreator;
+
+import com.artemis.ComponentMapper;
+import com.artemis.Entity;
+import com.artemis.annotations.Mapper;
+
+public class BombGamePlayerSystem extends PlayerSystemBase{
+	@Mapper ComponentMapper<BombGamePlayerComponent> playerMapper;
+
+	public BombGamePlayerSystem(NxtARCore core){
+		super(BombGamePlayerComponent.class, core);
+	}
+
+	@Override
+	protected void process(Entity e) {
+		BombGamePlayerComponent player = playerMapper.get(e);
+
+		if(player.lives == 0){
+			player.gameFinished = true;
+			player.victory = false;
+		}else if(player.disabledBombs == BombGameEntityCreator.NUM_BOMBS){
+			player.gameFinished = true;
+			player.victory = true;
+		}
+
+		if(player.gameFinished)
+			finishGame(player.victory);
+	}
+}
diff --git a/src/ve/ucv/ciens/ccg/nxtar/systems/MarkerPositioningSystem.java b/src/ve/ucv/ciens/ccg/nxtar/systems/MarkerPositioningSystem.java
index 8f71a94..126b437 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/systems/MarkerPositioningSystem.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/systems/MarkerPositioningSystem.java
@@ -26,6 +26,10 @@ import com.artemis.ComponentMapper;
 import com.artemis.Entity;
 import com.artemis.annotations.Mapper;
 import com.artemis.systems.EntityProcessingSystem;
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.math.Matrix3;
+import com.badlogic.gdx.math.Matrix4;
+import com.badlogic.gdx.math.Quaternion;
 
 public class MarkerPositioningSystem extends EntityProcessingSystem {
 	@Mapper ComponentMapper<MarkerCodeComponent> markerMapper;
@@ -33,12 +37,18 @@ public class MarkerPositioningSystem extends EntityProcessingSystem {
 	@Mapper ComponentMapper<VisibilityComponent> visibilityMapper;
 
 	private MarkerData markers;
+	private Quaternion qAux;
+	private Matrix4    correctedRotation;
+	private Matrix3    mAux;
 
 	@SuppressWarnings("unchecked")
 	public MarkerPositioningSystem(){
 		super(Aspect.getAspectForAll(MarkerCodeComponent.class, GeometryComponent.class, VisibilityComponent.class));
 
 		markers = null;
+		qAux = new Quaternion();
+		mAux = new Matrix3();
+		correctedRotation = new Matrix4();
 	}
 
 	public void setMarkerData(MarkerData markers){
@@ -61,8 +71,25 @@ public class MarkerPositioningSystem extends EntityProcessingSystem {
 		for(int i = 0; i < ProjectConstants.MAXIMUM_NUMBER_OF_MARKERS; i++){
 			if(markers.markerCodes[i] != 1){
 				if(markers.markerCodes[i] == marker.code){
+
+					qAux.setFromMatrix(markers.rotationMatrices[i]).nor();
+
+					if(Math.abs(qAux.getRoll()) > 10.0f){
+//						qAux.setEulerAngles(qAux.getYaw(), qAux.getPitch(), 0.0f);
+//						qAux.toMatrix(correctedRotation.val);
+//						mAux.set(correctedRotation);
+						mAux.set(markers.rotationMatrices[i]);
+
+						Gdx.app.log("ROTATION", "YAW  : " + Float.toString(qAux.getYaw()));
+						Gdx.app.log("ROTATION", "PITCH: " + Float.toString(qAux.getPitch()));
+						Gdx.app.log("ROTATION", "ROLL : " + Float.toString(qAux.getRoll()));
+						Gdx.app.log("ROTATION", "------------------------------------------");
+					}else{
+						mAux.set(markers.rotationMatrices[i]);
+					}
+
 					geometry.position.set(markers.translationVectors[i]);
-					geometry.rotation.set(markers.rotationMatrices[i]);
+					geometry.rotation.set(mAux);
 					visibility.visible = true;
 					break;
 				}else{
diff --git a/src/ve/ucv/ciens/ccg/nxtar/systems/PlayerSystemBase.java b/src/ve/ucv/ciens/ccg/nxtar/systems/PlayerSystemBase.java
new file mode 100644
index 0000000..c273e6a
--- /dev/null
+++ b/src/ve/ucv/ciens/ccg/nxtar/systems/PlayerSystemBase.java
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2013 Miguel Angel Astor Romero
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package ve.ucv.ciens.ccg.nxtar.systems;
+
+import ve.ucv.ciens.ccg.nxtar.NxtARCore;
+import ve.ucv.ciens.ccg.nxtar.components.PlayerComponentBase;
+import ve.ucv.ciens.ccg.nxtar.utils.GameSettings;
+
+import com.artemis.Aspect;
+import com.artemis.Entity;
+import com.artemis.systems.EntityProcessingSystem;
+
+public abstract class PlayerSystemBase extends EntityProcessingSystem {
+	protected NxtARCore core;
+
+	@SuppressWarnings("unchecked")
+	public PlayerSystemBase(Class<? extends PlayerComponentBase> component, NxtARCore core){
+		super(Aspect.getAspectForAll(component));
+
+		if(component == null)
+			throw new IllegalArgumentException("Component is null.");
+
+		if(core == null)
+			throw new IllegalArgumentException("Core is null.");
+
+		this.core = core;
+	}
+
+	protected final void finishGame(boolean victory){
+		// TODO: Switch to game over state.
+		// TODO: Set game over state parameters.
+		GameSettings.getEntityCreator().resetAllEntities();
+		core.nextState = NxtARCore.game_states_t.MAIN_MENU;
+	}
+
+	@Override
+	protected abstract void process(Entity e);
+
+}
diff --git a/src/ve/ucv/ciens/ccg/nxtar/systems/RobotArmPositioningSystem.java b/src/ve/ucv/ciens/ccg/nxtar/systems/RobotArmPositioningSystem.java
index c7171e7..fc59807 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/systems/RobotArmPositioningSystem.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/systems/RobotArmPositioningSystem.java
@@ -19,7 +19,6 @@ import ve.ucv.ciens.ccg.nxtar.components.AutomaticMovementComponent;
 import ve.ucv.ciens.ccg.nxtar.components.CollisionDetectionComponent;
 import ve.ucv.ciens.ccg.nxtar.components.GeometryComponent;
 import ve.ucv.ciens.ccg.nxtar.components.MarkerCodeComponent;
-import ve.ucv.ciens.ccg.nxtar.entities.BombGameEntityCreator;
 import ve.ucv.ciens.ccg.nxtar.input.GamepadUserInput;
 import ve.ucv.ciens.ccg.nxtar.input.KeyboardUserInput;
 import ve.ucv.ciens.ccg.nxtar.input.TouchUserInput;
@@ -40,6 +39,7 @@ public class RobotArmPositioningSystem extends EntityProcessingSystem {
 	private static final float   INTERPOLATION_STEP  = 0.05f;
 	private static final float   STEP_SIZE           = 0.05f;
 	private static final float   MAX_Z               = -4.5f;
+	private static final float   MIN_Z               = -1.0f;
 
 	@Mapper ComponentMapper<GeometryComponent>           geometryMapper;
 	@Mapper ComponentMapper<AutomaticMovementComponent>  autoMapper;
@@ -73,7 +73,7 @@ public class RobotArmPositioningSystem extends EntityProcessingSystem {
 			if(input instanceof TouchUserInput){
 				if(!auto.moving){
 					endPoint = ((TouchUserInput) input).userTouchEndPoint;
-					endPoint.set(endPoint.x, endPoint.y, MAX_Z);
+					endPoint.set(geometry.position.x, geometry.position.y, MAX_Z);
 					auto.startPoint.set(geometry.position);
 					auto.endPoint.set(endPoint);
 					auto.moving = true;
@@ -85,33 +85,36 @@ public class RobotArmPositioningSystem extends EntityProcessingSystem {
 			}else if(input instanceof GamepadUserInput){
 				tempGP = (GamepadUserInput) input;
 
-				if(!collision.colliding){
-					geometry.position.x += tempGP.axisLeftY * STEP_SIZE;
-					geometry.position.y += tempGP.axisLeftX * STEP_SIZE;
-					geometry.position.z += tempGP.axisRightY * STEP_SIZE;
-				}else{
-					auto.moving = true;
-					auto.forward = false;
-					auto.startPoint.set(geometry.position);
-					auto.endPoint.set(BombGameEntityCreator.ROBOT_ARM_START_POINT);
-				}
+				if(!auto.moving){
+					if(!tempGP.oButton){
+						geometry.position.x += -tempGP.axisLeftY * STEP_SIZE;
+						geometry.position.y += tempGP.axisLeftX * STEP_SIZE;
+					}else{
+						endPoint = new Vector3(geometry.position.x, geometry.position.y, MAX_Z);
+						auto.startPoint.set(geometry.position);
+						auto.endPoint.set(endPoint);
+						auto.moving = true;
+						auto.forward = true;
+					}
+				}else autoMove(geometry, auto, collision);
 
 			}else if(input instanceof KeyboardUserInput){
 				tempKey = (KeyboardUserInput) input;
 
-				if(!collision.colliding){
-					geometry.position.x += tempKey.keyUp ? STEP_SIZE : 0.0f;
-					geometry.position.x -= tempKey.keyDown ? STEP_SIZE : 0.0f;
-					geometry.position.y -= tempKey.keyLeft ? STEP_SIZE : 0.0f;
-					geometry.position.y += tempKey.keyRight ? STEP_SIZE : 0.0f;
-					geometry.position.z -= tempKey.keyZ ? STEP_SIZE : 0.0f;
-					geometry.position.z += tempKey.keyA ? STEP_SIZE : 0.0f;
-				}else{
-					auto.moving = true;
-					auto.forward = false;
-					auto.startPoint.set(geometry.position);
-					auto.endPoint.set(BombGameEntityCreator.ROBOT_ARM_START_POINT);
-				}
+				if(!auto.moving){
+					if(!tempKey.keySpace){
+						geometry.position.x += tempKey.keyUp ? STEP_SIZE : 0.0f;
+						geometry.position.x -= tempKey.keyDown ? STEP_SIZE : 0.0f;
+						geometry.position.y -= tempKey.keyLeft ? STEP_SIZE : 0.0f;
+						geometry.position.y += tempKey.keyRight ? STEP_SIZE : 0.0f;
+					}else{
+						endPoint = new Vector3(geometry.position.x, geometry.position.y, MAX_Z);
+						auto.startPoint.set(geometry.position);
+						auto.endPoint.set(endPoint);
+						auto.moving = true;
+						auto.forward = true;
+					}
+				}else autoMove(geometry, auto, collision);
 
 			}else
 				throw new ClassCastException("Input is not a valid UserInput instance.");
@@ -141,13 +144,18 @@ public class RobotArmPositioningSystem extends EntityProcessingSystem {
 
 			Gdx.app.log(TAG, CLASS_NAME + ".autoMove(): Current position: " + Utils.vector2String(geometry.position));
 
-			if(auto.distance <= 0.0f){
+			if(auto.distance <= 0.0f || geometry.position.z >= MIN_Z){
+				geometry.position.x = auto.startPoint.x;
+				geometry.position.y = auto.startPoint.y;
+				geometry.position.z = MIN_Z;
+
 				auto.forward = true;
 				auto.moving = false;
+
 				Gdx.app.log(TAG, CLASS_NAME + ".autoMove(): Going forward now.");
+
 			}else if(auto.distance >= 1.0f || collision.colliding){
 				auto.forward = false;
-				auto.startPoint.set(BombGameEntityCreator.ROBOT_ARM_START_POINT);
 				Gdx.app.log(TAG, CLASS_NAME + ".autoMove(): Going backwards now.");
 			}
 
diff --git a/src/ve/ucv/ciens/ccg/nxtar/utils/ProjectConstants.java b/src/ve/ucv/ciens/ccg/nxtar/utils/ProjectConstants.java
index 7ed1fe1..dc13c2c 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/utils/ProjectConstants.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/utils/ProjectConstants.java
@@ -28,7 +28,7 @@ public abstract class ProjectConstants{
 	public static final int     EXIT_SUCCESS               = 0;
 	public static final int     EXIT_FAILURE               = 1;
 
-	public static final boolean DEBUG                      = false;
+	public static final boolean DEBUG                      = true;
 
 	public static final int[]   POWERS_OF_2                = {64, 128, 256, 512, 1024, 2048};
 	public static final float   MAX_ABS_ROLL               = 60.0f;
diff --git a/src/ve/ucv/ciens/ccg/nxtar/utils/Utils.java b/src/ve/ucv/ciens/ccg/nxtar/utils/Utils.java
index 15a7ed7..8509427 100644
--- a/src/ve/ucv/ciens/ccg/nxtar/utils/Utils.java
+++ b/src/ve/ucv/ciens/ccg/nxtar/utils/Utils.java
@@ -15,10 +15,28 @@
  */
 package ve.ucv.ciens.ccg.nxtar.utils;
 
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.Input.Peripheral;
 import com.badlogic.gdx.math.Vector3;
 
 public abstract class Utils{
 	public static String vector2String(Vector3 v){
 		return "(" + Float.toString(v.x) + ", " + Float.toString(v.y) + ", " + Float.toString(v.z) + ")";
 	}
+
+	public static int getScreenWidth(){
+		return (int)(Gdx.graphics.getWidth() * ProjectConstants.OVERSCAN);
+	}
+
+	public static int getScreenHeight(){
+		return (int)(Gdx.graphics.getHeight() * ProjectConstants.OVERSCAN);
+	}
+
+	public static boolean isDeviceRollValid(){
+		boolean rollValid = Gdx.input.isPeripheralAvailable(Peripheral.Accelerometer) && Gdx.input.isPeripheralAvailable(Peripheral.Compass);
+
+		// TODO: Check device orientation for limits.
+
+		return rollValid;
+	}
 }