Press ESC during game play to display the options menu, then type "glazed donut" to enable cheat mode. Then, activate the following cheats by entering the corresponding codes:

CHEAT FUNCTION - CHEAT CODE
Return to previous level - F3
Level skip - F4
Five more lives in single player mode - ALT + F12
Unlimited bombs in single player mode - ALT + 8
Beach ball - ALT + K
Invisio power - ALT + I
Morph - ALT + T
Cloak - ALT + B
ALTernate appearance - ALT + F7 or F8
Toggle scrolling - ALT + S

Activate the following cheats by entering the corresponding case-sensitive codes at the Main Menu:

Alternate Wacky World previews - goofy
Hidden FMV sequence - kratin'it
Hidden levels - followme (Select the credits option to play a set of hidden levels)

Use the ALT + T code immediately when the level loads before even pressing the cursor keys and the monks will freeze. The monk will still kill you if you run on its square. If you bomb it, it will show the flame of the monk dying, and it will not hurt you after that.