Try Gamemaker at
www.gamemaker.nl. It's a bit complicated to use, but you might find it easy-- who knows.
Edit: The South Park version is different, or at least my version (I didn't make it). The first level is different, the second and third levels are 1-2 and 1-3 in SMB and Level 4 is the first SMW Ghost House. After that is Bowser, where you throw paintbombs at him, then there's Mr Garrison, who throws puppets at you.
Edited by - Luigi Simpson on 1/20/2005 11:27:32 PM