Hold F1 and enter one of the following codes:
btiny: Small character
ghost: Disable opponent physics
silky: Enemies ignore character
aiaim: Toggle AI
agrav: Limb gravity
lunar: Lunar gravity
peace: Kill enemies
qsave: Quick save
pause: Pause the game
colid: Display collision boxes
hicup: Bounce around
catch: Toggle out of world trapping
frame: Screen capture
gamma: Adjust gamma brightness
mukor: God mode
dedly: Super weapon
bills: Bill's demo mode
funky: Funky key mode
ifall: Falling mode
freez: Pause enemy
bamff: End level
ntrud: Enemy select
gmode: Turbo mode
tough: Expert mode
windo: Window mode
golrg: Large character
sepku: Commit suicide
bzone: Wireframe and shading
fpers: Display sound cache errors
goura: Enable gourad shading
nfade: Palette fading
crash: Immediately quit game
sunny: Disable advanced shadows