The Simpsons: Bart vs. the Space Mutants Cheats

If you go to the theater between 2:00 and 4:00 you'll find a bonus screen.

On the second level of the mall (maybe third...) you have to go across wet cement by jumping on candy bars and suckers. Jump onto the second candy bar and jump on it 2 or 3 times. It'll give you a free ride to the end of the wet cement.

In Level 1, stand to the right of the ''E'' on the ''Quick-E-Mart'' sign. Shoot one of your rockets at the ''E'' to make a Krusty Clown Face appear that gives you three extra lives and a Sound Test.