Get all 1000 marbles on all stages, go to the first stage in Fear. 
There is a door in front of the Professor Monkey-For-A-Head rug, 
go in it, you have to be as smart as a smart superhero (collect all 
1000 marbles) before you go in. When you go in, it stops your game 
and goes to the beginning part, where Jim is playing the accordion, 
but Jim isn't there, Kim is. When you start the game with Kim you 
start from the very beginning (as smart as pond scum). Kim does 
the same things as Jim but she is two times weaker, her shots do 
less damage, those health thingies regain two precent instead of 
five, and marbles don't regain health.