I like the music, the assets (even though they're not consistent and don't fit that well) and the base gameplay idea, but it has it's problems with how it's programmed sadly. Here are some ideas on how you could improve it:
- Add more music tracks or make the music play all the time, even in menu, looping over and over instead of ending when level ends and starting again when you enter the next level. Gets tiring hearing the same beginning of the song over and over.
- Polish the UI. It's difficult on the eyes.
- Maybe add "next level" and "level select" buttons? Don't send the player to the main menu every time they beat a level.
- Make the ball sprite actually spin, give it better physics.
- Tweak the rotation speed, maybe add a little fade in and fade out when pressing and releasing left/right so it's not that instant.
But yeah, the idea is there and it's nice. Congrats!