On the main screen go to password and enter these passwords to go to certain levels in the game.

Password	Effect
RCXQNB	Flamin' Yawn
L6RGDG	Inflated Head
TF1NLJ	ISO 9000
QBWNQD	Level Ate
H3NB86	Puppy Love Part 3
SDZNLM	Secret Level: Totally Forked
CZK9C9	See Jim Run