At the 'Main' menu go to 'Options' and enter the following passwords in lower case to unlock the corresponding effect. If the code has been entered correctly you will hear a confirmation sound.

Unlock ALL Recipes:
Enter anyonecancook

Unlock ALL Videos:
Enter gusteauvid

Unlock 9,999 Cheese:
Enter saycheese

Unlock Bouncy Cheese:
Enter boingspawn

Can ALL Blue Cheese:
Enter skycan

Unlock Hard Enemies:
Enter deepfryer

Unlock Easy Enemies:
Enter pieceocake

Any Health Restores to Full:
Enter itscake

Enemies Cause No Damage:
Enter myhero