The objective is to survive as long as possible. You use Power-Ups to prolong the killing. Points are awarded based on kills. Press A or Left Arrow Key to rotate the ship counter-clockwise. Press D or Right Arrow Key to rotate the ship clockwise. Press W or Up Arrow Key to move the ship forward. Press S or Down Arrow Key to move the ship backwards. Press Space Bar to fire a torpedo. Press B to fire a high-yield torpedo. kids!