This was a pretty polished bullet hell game! Thought that the difficulty curve was pretty good, introducing you to new enemy types gradually and then combining them in interesting ways - also liked that the health pickups weren't just randomly dispersed throughout the field but started showing up as you increased in size. The player movement struck a pretty good balance between floatiness and snappiness that I feel is critical to this type of game.
Not a whole lot to comment on otherwise - sometimes the health pickups came on a bit rapidly, so it felt like I could incur damage freely at some spots. It seems like there might be a buffer between when you're allowed to get hit again, maybe that could be shortened a bit? Well done on the game!