Use up and down arrow to maneuver the sub around obstacles use WASD to maneuver second player sub around obstacles. And use space to launch torpedoes from the main sub and X to shoot bullets from the mini subs, (if you shoot a mine it will explode and will end the game and you start out with 6 torpedoes, so you have to collect the torpedo tokens) and you have to collect the green tanks to top your air supply and not run out of air. Enjoy!!!