Easy level completion - Press Plus to pause the game. The in-game time will continues to pass. After the sun is gone for awhile, resume the game to complete the level.

Catapults Only mode - Display the credits, then select the "IM IN UR CONSOLZ DFENDIN UR CASLEZ" text when it appears.

Giant stickmen - Display the credits, then select the "SMB3W4" text when it appears.

Small stickmen - Display the credits, then select the "Chuck Norris" text when it appears.