Very tidy!
I've got two suggestions, but both are pretty minor.
- The threshold for determining when the ball has stopped is a bit low. That is, it looks like it's stopped but I can't hit it for just a little longer than I'd like (probably I'm just too impatient :p)
- When the ball is near the edge of the screen, it can be hard to aim. Possibly a border would help?
Also, I liked the graphics for the ball falling into the hole.