Bonus mode
Successfully complete the game to unlock the Bonus Mode option
To defeat the bosses
For air when he isnt attacking shoot at his three circles
For earth keep avoiding his attacks when he bends down and his faces turn red hit his faces When he falls apart hit nine of his minions
For fire between attacks stand on the aiming circle and hit the target behind his head After he falls down keep hitting his 2nd head All of them will eventually explode