Place the items in the arena and select the ball colors in order to provoke a chain reaction which leads to to destroy all balls of a level in a one-shot!
Destroy all balls to access next level. Press a ball to display the color selector and change it's color. Balls with the same color repulse themselves. Identical balls explode when they collide with enough speed. Move electric barriers, speeders, turnstiles and repulsors to ensure balls will collide. Pipes can't be moved.