Just 1 hole?!!
I agree with frazzle's statements about the ball direction and physics.
I do like that you used terrain(i'm quessing that is what you used.), i actually was thinking about using terrain for my mini-golf game also, but decided to keep it simple this time, also a little more distance on the camera view would be nice and a different hole border texture, it blends into the grass to much.. I do like how you control the shot power though and was actually tring to work on a script to do that but my scripting know-how isn't that great.