You want the ball to hit the rock under the glass to make it a curve projecting as much to the left, as steep as possible. Almost. For some reason, the best solution does not have the falling curve to the minimum distance to the goal. Also, in my solution it depends a bit on luck because the shattering glass would influence the ball's path. It only works every third try. P
That is a good final point. My 650 solution has the ball coming off the top (after shattering the glass) in a different path every other time. So you need to try your solution out a few times to make sure that you don't get the "bad" path with a lower score, and then move the arrows. I'd be surprised if you can get more than 650. I've tried, but haven't had any success.
I had a record low of 2 points yesterday. And that was with assistance. I think there are still some more points to be found, but I think that everyone has done a great job at pushing most of the levels to their max score at this point.