This is a really solid entry! It has very nice UI, a good visual style with pleasing colors, and feels fairly responsive. Nice work!
Some feedback:
- A more unique background might help the game develop a more distinct visual identity! I could tell it was just the default Godot empty scene background as soon as I launched it.
- I found it very difficult to orient myself to what was "flat" with respect to the ball rolling. This made things on the "keep it steady" level a little tricky.
The puzzles were, in my opinion, very well designed. I think you should be really happy with this project :)