Hello. When second boss reaches half of his health second phase triggers. The heads are supposed to work that way it creates smaller circular arena for better challenge that you are supposed to fight him in. Thank you for this feedback im very happy u like the game.
I will improve visual a clarity of the second phase so player can understand he is supposed to run to the middle.
PS: Yeah im pretty proud of that critical hits and im super glad that you are having blast playing my game