Move - Arrow keys Fire - Space key Mute/Unmute - M Asteroids and enemy ships damage your HP . Fire at them to gain HP or lasers . Destroying an enemy ship gives you 1/4 of a star . Collect three stars to unlock the boss . The boss have 5 lives, destroy it to win . Enemy's laser could also destroy asteroids, with a possibility of dropping lasers or HP . Good luck for the battle !!! :)
Credits to caterpillarstyle ....
