Various cheats

Cheat code:             Effect:
meowmeowlikemeowman     9 lives
eatmorebran             9 continues
hatman                  turns you into hatman.  2nd time typed, you
                        are normal, but all animate things are hatman.
                        3rd time, you are back to normal
iddqd                   message SORRY THIS AINT DOOM then shows developers
framerate               shows the framerate at the top of the screen
fiveeasypieces          gets you to 5th level
pumpyouup               gets you 99 items of each weapon
letsdothetimewarp       back to original Pitfall game
paidtoplay              have not tried it yet
Idbuythatforadollar     enables access to all levels