When you get to the screen with the crab, press space. After that, use the left and right arrows to rotate the launcher, and press space to launch a pellet. Your goal is to shoot all the ghosts that show up on screen. If you shoot one, you get a point. If a ghost hits the launcher, you lose some health. There are three types of ghosts (green, blue, and white), but there is no difference between types, other than color.
Use fullscreen!
