diff --git a/src/gstates/menu.lua b/src/gstates/menu.lua
index dd74525..f0c9ba7 100644
--- a/src/gstates/menu.lua
+++ b/src/gstates/menu.lua
@@ -11,7 +11,7 @@ local Sprite      = require 'src.graphics.sprite'
 local Cursor      = require 'src.ui.cursor'
 local Font        = require 'src.ui.font'
 local SoundEffect = require 'src.sound.sfx'
-local ButtonGroup = require 'src.ui.btngrp'
+local VBox        = require 'src.ui.vbox'
 
 
 ------------------------------------------------------------------------------
@@ -35,7 +35,7 @@ function MainMenu:_init(name, index)
     self.btn_font   = Font('fonts/Concrete.ttf')
 
     -- Create UI elements.
-    self.btns = ButtonGroup(15, 15)
+    self.btns = VBox(15, 15)
     self.btns:add_text_button('New Game', self.btn_font)
     self.btns:add_text_button('Load Game', self.btn_font)
     self.btns:add_text_button('Options', self.btn_font)
diff --git a/src/ui/btngrp.lua b/src/ui/vbox.lua
similarity index 81%
rename from src/ui/btngrp.lua
rename to src/ui/vbox.lua
index 9f942ed..ce69fb3 100644
--- a/src/ui/btngrp.lua
+++ b/src/ui/vbox.lua
@@ -12,14 +12,14 @@ local TextButton  = require 'src.ui.textbtn'
 -- Class definitions
 ------------------------------------------------------------------------------
 
-local ButtonGroup = make_class(Drawable, Asset)
+local VBox = make_class(Drawable, Asset)
 
 
 ------------------------------------------------------------------------------
 -- Class methods
 ------------------------------------------------------------------------------
 
-function ButtonGroup:_init(x, y, spacing)
+function VBox:_init(x, y, spacing)
     self.x    = x ~= nil and x or 0
     self.y    = y ~= nil and y or 0
     self.s    = spacing ~= nil and spacing or 10
@@ -27,12 +27,12 @@ function ButtonGroup:_init(x, y, spacing)
 end
 
 
-function ButtonGroup:add_text_button(text, font, callback, base_col, sel_color, press_col)
+function VBox:add_text_button(text, font, callback, base_col, sel_color, press_col)
     table.insert(self.btns, TextButton(text, font, 0, 0, callback, base_col, sel_color, press_col))
 end
 
 
-function ButtonGroup:load()
+function VBox:load()
     local y = self.y
 
     -- Load required assets if needed and then compute the coordinates of each button.
@@ -49,7 +49,7 @@ function ButtonGroup:load()
 end
 
 
-function ButtonGroup:unload()
+function VBox:unload()
     for _, v in pairs(self.btns) do
         if v.is_a[Asset] then
             v:unload()
@@ -58,35 +58,35 @@ function ButtonGroup:unload()
 end
 
 
-function ButtonGroup:update(dt)
+function VBox:update(dt)
     for _, v in pairs(self.btns) do
         v:update(dt)
     end
 end
 
 
-function ButtonGroup:draw()
+function VBox:draw()
     for _, v in pairs(self.btns) do
         v:draw()
     end
 end
 
 
-function ButtonGroup:mousemoved(x, y, dx, dy)
+function VBox:mousemoved(x, y, dx, dy)
     for _, v in pairs(self.btns) do
         v:mousemoved(x, y, dx, dy)
     end
 end
 
 
-function ButtonGroup:mousepressed(x, y, btn)
+function VBox:mousepressed(x, y, btn)
     for _, v in pairs(self.btns) do
         v:mousepressed(x, y, btn)
     end
 end
 
 
-function ButtonGroup:mousereleased(x, y, btn)
+function VBox:mousereleased(x, y, btn)
     for _, v in pairs(self.btns) do
         v:mousereleased(x, y, btn)
     end
@@ -97,4 +97,4 @@ end
 -- Module return
 ------------------------------------------------------------------------------
 
-return ButtonGroup
+return VBox