Really unique idea. It's really simple, but I prefer overly complicated games. It's definitely also a twist on the scale mechanic I haven't seen thus far. Good job! The animations and stuff also feel really satisfying to play.
The only improvement I can think of is that I am not totally sure when you get the different kinds of medals; maybe that's something to make a bit clearer.
Besides that, it's a really cute and charming game. Good job!