W for up, A for left, S for down, D for right, space for big blast. A combination of up and left makes you go diagonally up and left, same with up and right, makes you go diagonally up and right, same for down. Get to the spaceship while avoiding the zombies (green dots). Red Screen: Game Over. Green Screen: You win.
The number on bottom left is the number of big blasts you have. The red guy that follows you will destroy any zombie it touches. I'm trying to program highscores-if anybody can help I'm open to ideas. More games and videos: http://scratch.mit.edu/studios/461304/