Neat intro and background visuals were quite nice and I liked the movement mechanics you had for the bosses. The hitbox on the boss seemed kind of broken it is way larger than the visuals would indicate and made the bouncing movement frustrating. It was very hard to tell if I was hitting the boss, and when I wasn't it was unclear why. Some damage feedback for both the boss and the player, even just a simple damage flash would go a very long way.