Well, think I did some damage :p

Got it down to -82000, then either the algo changed or it started acting different. All I did was simply choose left/right, then click w/e won the first round twice, then alternate 11 times (this method isn't guaranteed at 15+ bets).

Screenshots:

100%: http://i.gfxtub.com/7897ab.png
92%: http://i.gfxtub.com/7815b1.png

I basically did that a lot, doing 1U bet for the first, then max for the rest, never more than 14 bets, then refresh (sorry if I hit your servers too hard!)

Did I beat it? :p