Created the constants.py file. Removed NotValidState.

constants.py

@@ -0,0 +1,2 @@
+# Debug constant. Set to False to turn off debugging messages.
+DEBUG = False

game.py

@@ -13,9 +13,7 @@ from menu import MenuState
 from ingame import InGameState
 from score import ScoreState
 from notvalidstate import NotValidState
-
-# Debug constant. Set to False to turn off debugging messages.
-DEBUG = False
+from constants import DEBUG
 
 # The Game class implements the state machine of the game and
 # runs the main game loop.

intro.py

@@ -14,6 +14,7 @@ from state import BaseState, VALID_STATES
 import actor
 import game
 import particle
+from constants import DEBUG
 
 class IntroState(BaseState):
    def __init__(self):

notvalidstate.py

@@ -1,37 +0,0 @@
-# Miguel Angel Astor Romero. Created on 7-1-2013. #
-###################################################
-import pygame
-
-try:
-   import android
-except ImportError:
-   android = None
-
-from state import BaseState, VALID_STATES
-
-class NotValidState(BaseState):
-    def __init__(self):
-       BaseState.__init__(self)
-
-       self.count = 0
-       screen_center = self.get_screen_center()
-       self.rectangle = pygame.Rect(screen_center[0] - 50, screen_center[1] - 50, 100, 100)
-       self.next_transition = VALID_STATES['STAY']
-
-    def input(self):
-       for event in pygame.event.get():
-          if android:
-             if android.check_pause():
-                android.wait_for_resume()
-
-          if event.type == pygame.KEYDOWN:
-             self.next_transition = VALID_STATES['QUIT']
-          if event.type == pygame.QUIT:
-             self.next_transition = VALID_STATES['QUIT']
-
-    def update(self):
-       return self.next_transition
-
-    def render(self, canvas):
-       canvas.fill(self.background_color)
-       pygame.draw.rect(canvas, (0, 0, 0), self.rectangle)