This was really fun! The little popups as you move through the atmosphere are cute, and I really like the model for the player. The debris models are good too, though I think if they were a little more colorful they would be both easier to see and fit in well with the casual, relaxing atmosphere set by the music and UI.
The flying movement is quite good, I felt like I could dodge through tight gaps pretty effectively. It can be hard to judge distances from this angle though, so the moving objects could be tricky. A manual boost could definitely help there. The other thing was the hitboxes on the powerups felt a bit small. They're probably accurate, but I guess it's usually best to always make "good" hitboxes a bit larger than the object and "bad" hitboxes smaller than the obstacle if you want it to always feel fair!
Well done!