In Shape Spiltter you must move your mouse and contact a specific shape that has a specific color. The text on the top right will tell you what shape you should hit and the color of the text will tell you what color the shape should be. There are 2 different shapes and 3 different colors. Click the mouse or press space to use a time bomb. A time bomb will freeze all current enemies and after 3 seconds it will clear the entire play field of enemies. Using a time bomb will drop your multiplier by 5 so use them wiseley. The background color has nothing to do with the game play.