You are a Gak, (Biggest cube) you use your arrow keys to chase medium size cubes, and eat them by smashing into them. (the medium size cubes are called Oobs). (you cannot go backwards) Medium size cubes will try to eat small cubes (which are called Glops.) If you smash into a small cube you will bounce back a little. The objective is to eat all medium size cubes before all small cubes get eaten. If you smash into a pyramid (which are called speedy-speeds) you will boost forward immediately, fast for a small amount of time.