Playing the game is simple. Press either 5-Point or 9-Point mode to start. You can also toggle on or off 'aim mode' which restores the classic gameplay from the original Atari version, though it is very buggy. Wall collision could be improved, but I don't know what else to do about it. WASD as arrows for player 1, IJKL as arrows for player 2. W and I make ship go forward, A, D, J, and L turn the ship. S and K move the ship backwards. C and N are for shooting.
Update v1.2 Info: -Gorgeous new backgrounds -Improved controls and detection -Added Title Screen -Changed Mirror Stage to be less buggy