It is a 2D top view game. Player is the red colour ball in the center of screen. The rules for this game are very simple. Colour balls can merge any smaller ones in fronts of them or any ones from their back. The more it merges, the bigger it grows.

The game filed is enormous and looped so there will be no edges in the game. Player needs to merge smaller colour balls to become bigger and bigger. Also small colour balls can 'steal' colours from bigger ones. When a big colour ball is merging a small colour ball, the big one can not move until it finish merging or the small one runs away. Player needs to avoid bigger ones. When player gets caught by a bigger one, it can turn around and run away by cutting off some amount of itself (player will become smaller). Also player can 'steal' bigger one's colour (making it smaller) while it is merging other colour balls.