Type CAMERON (all caps) to get the cheat menu. The cheat menu comes up in the menubar.
Sketch fart
Defeat all enemies in a room, then repeatedly tap [Down]. Alternately, hold [Down] and attack an enemy.
Sketch dance
Hold [Left] and [Right] to make sketch dance.
Invincibility
Go to the juke box under the options menu. Press C after selecting each of the following tracks, in order: 3, 12, 17, 2, 2, 10, 2, 7, 7, 11. Start a game and your power bar will never decrease.
Level select
Go to the juke box under the options menu. Press C after selecting each of the following tracks, in order: 14, 15, 18, 5, 13, 1, 3, 18, 15, 6. Highlight a number from 1 to 6 and press C to advance to select a new level when a new game is started.
Defeating multiple enemies
When there are two enemies on the screen to fight (as in a case like one of the last panels with two Strigels), move away from one of them if they throw fire balls. They will begin to throw fire balls. If there is a bar on top, jump up and grab it, then press [Up]. They will kill each other. Each takes 15 hits before they are killed.
Extra hits
Often when you use a bomb (dynamite) on an enemy, he/she will fall back and then fall on you. Try to throw him/her and you will beat them up before they die.
Weapons
Look for these power-up items: grenades, dynamite, knives, fists, road kill, iced tea and paper air planes. Paper air planes are created by holding [Attack].
Killing enemies
When there is an enemy and some sort of a destroying object (such as a stake or fan), get on the opposite side of the enemy and roll him/her towards the object. They cannot hurt you when you are rolling.
Nocturnal tournament
If you use a fist when fighting in the tournament ("Welcome To The Temple, episode 2, page 1), it will turn black and the announcer will say "Your tricks are useless here".
Hidden Roadkill
In the second page of "Welcome To The Temple", if you lost Roadkill, pick him up after the double staked gate at the beginning. Immediately after that you cannot see him, but he is pacing around there. Collect him.
Old Fung
When you go to the other side of the Kung Fu master (Boss in "Welcome To The Temple") he will usually say "How fast are your reflexes?". When he says "I'm everywhere!", he is about to die.
Sixth sense
When there are hidden enemies on the screen, Sketch Turner will keep panting in a ready stance instead of resting. For example in "Night Of The Mutants Part 1", Flying Kreep in barrels.