Fun! My 2nd Game: 
Yes, as you said, playing on the phone is slow and laggy. Also, when we enter the holes ourselves, the strike should be reset and there should be a speed adjustment, instead of holding down to hit the ball slowly or quickly (it is hard to hit from the corners on a horizontal screen, I can't see it with my finger :D), it is easier to make a selection (Hold and select). If you want, you can hold down, adjust the direction and hit when you release, or you can give the direction first, release and then hit and hit. It would also be easy to play while moving.