This game Is awesome. I loved it. Really fun and looks amaizing.
There are only two things that I would change:
1. More levels
2. Text Draws over game objects and i think it would look better if they were behind game objects. to do that I used a simple script (I asume you used TextMesh for the text):
public int SortingOrder = -1;
void awake() {
GetComponent<MeshRenderer>().sortingOrder = SortingOrder;
}
overall, excellent job :D