Arrow keys to move, space to shoot, fall off the edge to die, collect the falling green balls to score.
Updates to be made - Make health actually work - Make new sprites for everything - Make play area a lot smaller - Make a high score saver - Add upgrades / power ups OR Make it so you have to fall off the edge while being hit by the least possible of the score items. OR Make it so the green balls are radiation, you score when you kill the squares, and when the radiation reaches 100, you die.