Really cool boss design, the animation looks very cool. The control feel very similar to hollow knight which is really nice. The boss are challenging but since the control feel really natural for me so its really fun. The music are really nice too.
Tho it seem like when the blood is over 999 the game just freezed, and according to the blood count on the last boss, I assume you didn't expected it to go over 999? It makes the bloods increase related upgrade cannot be choose. Also, you need to restart from the beginning which is a bit annoying but its manageable.
One more thing, is the last boss inspired by NKG from hollow knight? The boss attack pattern is very similar to it which is really cool since that was one of my favorite bosses to me. It kinda makes it pretty easy to dodge after realizing that.
Anyways, very cool and polished game!