Click on a number gate on the left to release a ball. The number of the gate shows the beat on which the ball leaves the gate. Each level has a maximum amount of gates that can be opened. A ball must hit a block once in order for it to be clear. When a block is hit, a loading bar appear where it was. Once 8 beats have passed, the block will reappear. The object of the game is to have all of the blocks cleared (even just for a little bit).