Instructions: Use the right and left keys to rotate and space to fire (hold for auto-fire). Control fires the photon ray (if available). Shoot the dropping bombs and defend the homeland. Nuclear missiles (the long missiles) that come around every once in a while are very bad. If they hit, it is instant death. Bonus life and photon lasers are awarded every 6500 pts and the bombs do get faster as the game goes on. Periodically the powerup will appear, shoot it to get big shots for a while.