Shoot the balls to split them and keep at least one ball in the screen. If you wish you can collect some of the powerups. Use the left and right arrow keys to move the ship, press the spacebar to shoot.
Use the left and right arrow keys to move the ship, press the spacebar 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.