Hey! Usually I don't give this much feedback in my reviews, but as someone who also made a golfing game, I would like to take this opportunity to give some specific feedback. I think you should give the ball some more drag, as right now, it seems to travel very long distances and slide around more than expected. When the golfball hits the hole, instead of instantly moving it to the hole, have it linear interpolate to the center of the hole and also linear interpolate down in size a little bit so it looks like it fell in, or create an animation that you rotate to where the ball hit so it looks like a smooth transition into falling in.
Also, I think you should create a deadzone where once the ball is going slow enough, the player can re-fire it, so they dont have to wait until it is totally still.
I hope you understand I am just letting you know these because I just went through all the struggles of creating a golfing game, I am not trying to be rude! You created a great foundation for a golfing game in only a week! Great job!