Shoot all the yellow balls off the board before the red balls are eliminated by your opponent and you will advance to the next level. The winner gets fewer balls in the next round. Win 4 rounds to win the game.
LEFT CLICK on one of the red balls and HOLD the mouse button, DRAG the mouse to choose speed and direction, RELEASE to shoot.
A context menu should be shown when right-clicking or, on touch devices, long-pressing in the game. This menu especially allows to play in full screen and control the volume.