Unlocks everything: Enter GIMMIE.
Speedy: Enter AAARGH. Enables all hazards and pickups in time trial games.
Dumb Rocket Pick-ups: Enter STONEME. When the rocket is fired, a stone block is fired instead, which turns any non-invulnerable player it hits to stone.
Top-Down View: Enter IMACOPTER.
Unlimited Superpower Energy: Enter SPINACH .
Unlimited Dumb Rockets: Enter ROCKETMAN. Firing one results in the player being given another.