We are still searching for game pictures and screenshots for Bart vs. The Space Mutants (PC). We do not have any cheats, codes, or hints yet.

Enter the theater between 2:00 and 4:00.

Purchase the whistle from the Toys 'n' Stuff store and go to the nursing home. Blow the whistle and wait for Grandpa Simpson to begin throwing coins.

Obtain the whistle, then stand next to the last window at the Springfield Retirement Home. Blow the whistle to collect money from a man that appears at this location.

Type cowabunga and press [Enter] at the title screen.

Locate the invisible platform in the first level that is right next to the first store, about three inches away from the building to the left. It may be difficult to find, but will result in some letters coming down and two extra lives.
Shoot rockets at the "E" in the Quick E Mart for some extra lives. Rockets are bought at the Toy Store.