Nice boss patterns! I like how when you died it didn't repeat the same sequence of patterns again so I couldn't memorize the sequence and had to continue to be reactive. The telegraphing for the big water attacks was nice too. Could benefit from some attack/hit sfx to communicate to the player that the inputs they're making are registering and they're dealing damage. Also the health bar for the player was hard to watch while paying attention to attacking the boss -- maybe putting the health bar over the characters head would be clearer? Fun little project though, nice job :)