This feels like the kind of game that should have already existed - the idea is super simple, but it's somehow unfathomably addictive (Even if it feels like it shouldn't), the pixel art is also gorgeous, by the way. It's a little tricky to come up with weaknesses or criticisms, but I think it'd be nice if I could see the amount of shots I've taken - It's not necessary, but it would be a nice way to immediately indicate that it's what I'm going for (In fairness, I didn't read the description initially. Whoops!).
If you're ever looking to flesh this out, this would be a great mobile game with some more courses to play. Please look into expanding on this.