Bonus Chance at the end of an Area

Clear the screen by overthrowing the boss character. At the end of each area, there is a mask that becomes a gate to the next area. In order to open the gate, you must get a hold of the crystal ball. Birdo sometimes has the crystal ball, so get it back by defeating him. At the end of each world, the boss is waiting for you again Attack the boss character by throwing mushroom WockS