Think about it:
A Mulligan option would do the trick.
You buy a 10/50/100 "mulligan pack" at the pro shop, and you are allowed to use it only when you are alone and in practice mode.
That way you can putt the ball where you want, and then go on and on with your mulligans from there.
The practice mode just isn't enough: after 10 shots you are done with a hole and you need to start over... pretty annoying.