I dont really play golf games at all, but i tried out your game.
Maybe aiming could have been bit more precise. Especially when you got closer to the hole, you couldnt always get it lined up perfectly. Also i found it was hard to make very small hits when i was right next to hole.
Sometimes turning became really sluggish. At one point i was unable to hit the ball at all. Not sure what happened there.
Maybe if you had to get certain score to unlock next level, that would give player some goal to aim for.