I was on level 31
I was on level 31 but the flash application crashed. My score was 39,324,524 at that point.
This was fun at first but got kind of silly later on, when all the obstacles made winning it more luck than skill. Also I think that the scoring is skewed: you shouldn't have "x16" bonuses and holes in 1 should not be worth a million (though a hole in 1 actually is a low scoring shot once you get into the later levels, it still is way too much on the earlier ones). Something like two thirds of my score was from just three levels, where I got x8 or x16 bonuses and a lot of airtime.