Using the arrow keys, guide your marble through a series of mazes to try and get to the exit portal. You can rebound off of walls and transport from one portal to another of the same color. Watch out for holes, if you fall down one you will have to start over again. Magnets attract the marble and conveyer belts push the marble along in the direction they are pointing. Try not to be squished by stompers which move in and out of the platforms.