Neat concept, the boss was pretty fun. Although, there isn't really an incentive to fight enemies or use any other wheels. The two other wheels aren't as useful in combat due to the increased chance of getting hurt; they really only incentivise repeatedly spinning at the start until you win one, and even then the attacks are not worth it due to the likelyhood of dying and having to restart everything. Also, requiring the player to use the wheels in order to progress means that someone unlucky enough could die by simply attacking. If the wheel was not required but say, had a chance of buffing the player or something like that, it would be the player's fault if they lost, since it was their own choice to use it. Oh and for some reason I couldn't get the player to attack leftwards :P Nice art and animations, I like the use of the red and black colors to portray contrasting elements.