Enter these codes anytime during play:

 mpkfa        God mode
 mpbunz       Makes Claw strong
 mpfps        Display frame rate
 mppos        Display world position
 mpplayallday Infinite lives
 mpstopwatch  Display elapsed time
 mpjordan     Super jump
 mploaded     Full ammo
 mpapple      Full health
 mpcasper     Invisibility
 mppenguin    Ice sword
 mpfranklin   Lightning sword
 mpfreak      Catnip mode
 mplith       Monolith logos and music