Up arrow, down arrow, W or S to move. Tap any were on the screen to shoot (when energy is full). Try and avoid the enemies and the asteroids, or else your health will go down. You get a shield for 1 second for when you get hurt (so no instant death).
I did this alone and just used GOOGLE IMAGES for: 1.Player 2.Enemies 3.Asteroids 4.Health Bar 5.Energy Bar ---This game will be updated soon---