The game is super enjoyable. The controls feel nice and the boss is quite a challenge. The main mechanic also creates some really interesting strategy around when you want to attack.
I like concept. I'm not sure how well it fits the theme, but it's certainly interesting.
The art, music, and sounds all go together so well to create a really tense, fun fight. I'd really like to see them used in a full game. Congrats on finishing this in just 48 hours!