Love the aesthetics! Love the vibe! Love the music!
My biggest problem is with the rhythm game itself. I don't like how you get punished for barely missing an arrow (often in my case hitting it a bit too early). I feel like there should be a bigger range where you get fewer points. Also, the notes sometimes feel like they are placed randomly instead of in a rhythm, which makes the whole experience less satisfying. But perhaps that's a personal taste.