During gameplay, hold down the ~ or the F6 key and type in these codes:

POWER = Turn off Monster AI
WIPEOUT = Kill current monster
POWERUP = Give monster full energy
YOUPYRO = Play as monster for current level
YOUTWIT = Play as robot (used after ~YOUPYRO)
TRIPWIRE = Kill current robot
POWERTIE = Give robot full energy
OWQUITIT = Stops spores from targeting robot
TYPEWRITER = Prints framerate to screen