Defend Your Castle
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.
Display the credits, then select the "IM IN UR CONSOLZ DFENDIN UR CASLEZ" text when it appears.
Display the credits, then select the "SMB3W4" text when it appears.
Display the credits, then select the "Chuck Norris" text when it appears.
The Daily Poll