This is really cool! I thought the way I had to kill each boss by reflecting their projectiles is really unique. I also like how the boss sprites are made up of simple shapes. I thought the music was very fitting as well. My only complaint is that its pretty hard. Maybe you could make the size of the bat bigger so it easier to hit the projectiles. In the end I made it through the first two bosses, and I had a lot of fun, good job!