Cute pictures! I really like the music you created, and I honestly think I can listen forever~ I also like that, as a rhythm game, it actually has a bit of story/world setting — that feels pretty new and refreshing. And I think the connection with the theme is very solid.
The main improvement I’d ask for is more feedback when you hit the notes perfectly — maybe sound effects or small visual effects (like how Taiko has clear hit SFX). Right now, it’s mostly just seeing the notes disappear, and that doesn’t feel as satisfying.
Also, I feel like the charting/arrangement doesn’t always match the music’s rhythm: when you need to press space, it often doesn’t land on the beat. If that timing could be aligned better, the whole experience would feel much smoother.