You can relive the early days of computer gaming on your Arduino with Hunt the Wumpus.  This game is a particularly good fit for the RGB LCD shield:

• Different screens can have different backlight colors
• The LCD is large enough for selecting caves to move to or shoot into
• The Wumpus, bat, and pit can all have custom characters
• The D-Pad is well suited to handling menu navigation

You will need:

• Adafruit RGB LCD Shield
  
• Arduino Uno
  

Of course, you do run the risk of taking a wrong turn and being eaten by a Wumpus!