I got to level 22 or so I think, and I was really pissed at the camera. I was going for getting par on as many levels as possible, but pressing the restart button on that level had the camera moving with the mouse, which is a pain for me to watch. Plus, if you're shooting a ball on a level where the camera moves, then the camera is annoying again, because it moves once you release the ball. So I tried to look around for a keyboard shortcut for the restart and hit escape by mistake, which shut down the entire thing and I hadn't saved.
I can't be bothered to go back and try again
So, aside from some wonky physics and the bad camera, I had fun still. Good physics use, and some clever puzzles.