If you are stuck, you should post in the Help forum to get help on the level that you are stuck on.
I don't really like using cheats on games. I like a challenge and see if I can complete a game. Or if it is an easier game like Munch's Oddysee, I just like to play it as is.
I did find a site once which said about cheats for Munch, but they were really silly like "Play as Munch with Rabbit ears" and stuff like that, so I knew it was fake. But it was good for a laugh!
There are some cheats for Abe's Exoddus and Abe's Oddysee however.
http://www.oddworld.au.com/bonewerkz/
Abe Babe...