Maneuver the GooBall by tilting the level and rolling the GooBall. The arrow keys will move the GooBall. The left command key will jump the GooBall. The left option key will cause the GooBall to stick to whatever surface he is in contact with.
The goal for each level is to find the exit. You can collect gems along the way. You earn an extra life for every ten gems you pick up. Caution: If you run out of time before completing the level, or if you fall, then you lose a life.
Some levels require you to collect all of the green alien heads before the exit will become active. If an exit is not glowing, then you have more alien heads to collect!