Type these codes during the game:
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HATMAN                                    - Jim changes into hatman
ITSAWONDERFUL                    - Extra life
ONANDONANDON                    - Extra continue
SLAUGHTERHOUSE                 - First 5 levels are available
POPQUIZHOTSHOT                  - 1000 bullets
BLOATED                                   - Jim has an afro
SWEATY                                    - Big lips Jim
THREEMILEISLAND                  - 100% energy
GETTHECHEESETOSICKBAY  - All levels

You will hear Jim call you a "Cheater'' when you type in the code correctly