I like the main mechanic of launching you medallion, but I felt frustrated using it because I never could get the hang of it, and never could predict were it would land. I don't know if this is how you see the difficulty in your game, but if not maybe having a way to visualize at least part of the trajectory it's gonna have would help a lot. And then it was a bit more frustrating when I landed my medallion wrong because of that and had no way to get it back, except die and restart all over again.
I really think this is a cool idea, and it doesn't need much more for it to be really enjoyable in my opinion.