Sidenote: I'm listening to "Folksongs for a Nuclear Village" as I write this critique :)
This is a nice photo and I like most of what I see. The horizon tilt is not a good thing in this photo though. Also, as far as challenges are concerned, your score probalby suffered because your 'framing' element is not the primary impact of this photograph. It's a smaller secondary 'supportive' element. This particular image may have also made a stronger vertical shot as well....
Nice idea. This is a tough shot because the sky is so cloudless. Almost surreal. I kinda wish the subject wasn't dead center. It would have been nice if she and the sun were placed slightly more to the left of the frame.