Build the Hut.
Get a score of 1,000,000 in any level except survival.
Get A ranks in 15 or more levels.
Defeat the final boss and complete the standard set of 20 levels.
Beat the first 20 levels without upgrading your health.
Finish any level except Survival with over 3,000 coins.
Beat any level between 16 and 20 without taking any damage.
Get hit 100 times in total.
Reflect over 100 bullets with a single shield.
Get killed with no enemies on screen.