This was a cool idea for a game, The music was pretty nice too. I managed to cheese the second boss as it never seemed to want to go to the left side once it went to the right side of the level, As for the third boss... What!? Those patterns were absurd, I would've been fine with it if the bosses weren't already big damage sponges to begin with.
That being said, good job designing this game, it was fun :)