I love the Cuphead vibes and I like that the spin is implemented on the boss itself and it affects the player strategy. The hitboxes felt unforgiving at times and it was really hard to tell the perspective during the first phase with the hands, specially when they were performing the clap attack. I'd have also liked a way to visually tell my health, because there were many times I didn't know how many hits left I could take. I did like that the hit SFX was people mocking you, that was funny.
Overall, the game is nice and has a solid base, I would love to see it grow in the future.