It's a fun platformer game on ingenuity and dexterity. You have to correctly pave the way, according to the classical laws of gravity, friction and elasticity.
The rules are simple: 1) The ball bounces off the wall, if the color of the ball matches the color of the wall. 2) The ball goes through the wall, if the color of the ball and wall are different. 3) White walls are special: the ball bounces off them, regardless of the color. 4) You can change the color of the flighting ball using the colored buttons. 5) The goal is to get the ball into the black hole of the same color.