Complete the first level.
Complete any swamp level.
Complete any desert level.
Get the Hammer.
Complete Adventure Mode.
Complete Bonus Level 1.
Complete Bonus Level 101.
Complete Bonus Level 201.
Complete Bonus Level 301.
Collect 10 coins.
Defeat 5 purple enemies with the hammer.
Defeat 5 pink enemies with the hammer.
Defeat 5 blue enemies with the hammer.
Build a level in the editor.
Destroy 5 wooden boxes.
Complete any lava level.
Complete any cloud level.