Atmosphere is really nice, love the idea to do bullet hell to fight. Loved that every enemy has multiple unique patterns, but they can be a bit too long. Also the format of the life bar of the neemies is kind of strange, you should have make it horizontal or get lower from the top, not on the sides.
The platformer part is not as good though, the jump feels really off being too high and slow to get back down.
Overall nice bullet hell with a plot, amazing atmosphere, good job!