I agree, great idea. I would also suggest having her look somewhat to the right so we at least see one side of her face. And did you try making it black-and-white?
i really like this shot, but i think it could be improved a little, i would love to see this from another angle or maybe just a little closer, having less of the sand foreground and more of whatever she?s looking at... if possible, i would have removed the gatorade bottle and the other stuff that is in the sand... overall this image has a lot of potencial and i really like the idea, so here you have my point of view, i hope it is useful... good shot!