Unlock Hard Mode:
Beat the game on Normal Mode to unlock Hard mode. This also unlocks Body no. 2 & 3.
Unlock Hell Mode:
Beat the game on Hard Mode.
Trick:
This cheat can be found on the menu where you select the mini-game of your choice where the girl is standing to the left Just simply "TOUCH" her She'll react in different ways depending on where you touch her
Unlock final Body and Feet:
Beat Hell Mode to get final Body and Feet.