Use the arrow keys to make your way through the maze. If teh enemies touch you, you loose a life and go back to the beginning. Collect the keys on the second level so that you can get your friend out of his cage. The enemies don't lock the cage on the first level but they do on teh second level.
Sometimes, you have to press the green flag if you try again because it glitches. The game uses time as your score. the more time you have the higher your score is, but the point is to try to get the least time and the least score. So your high score will be the lowest amount of time spent until you loose.