Wow... go me...
I don't know how iit happened, but I have the top 3 scores on your high scores list. The 3rd is at least twice the 4th placed score.
Also, kinda fun, but could be better. I think the tumble weeds need to actually act as obstacles and not just visual distracitons. Also, perhaps the back ground could zoom out to show more of the area instead of the bugs just getting smaller. There could also be extra back grounds as well.
Also, tips for other players... save the sure shots for when you either need health or the bgs are about to fade away.