Well, I'm a complete photo newb, but I do have quite a bit of art experience, so here's my take:
I think it had the potential to be a nice photo, but the composition is laid out a little wrong. Both sides of the photo have a dress jutted right up next to the edge, which is generally a no-no in art. It creates a tension that is not pleasing to the eye. You either want the subject to be cropped off the edge, or farther from the edge. It's also laid out too bilateral, by which I mean you have a vertical divider that seperates the canvas into two almost identical sections (generally a no-no). It's usually a little more interesting to have one area of the art a little more weighted than the other. It's POSSIBLE to have an equally seperated canvas, but usually only in very particular situations.
Try cropping it differently. I think if the focus were shifted a bit to the left so that the little dress were in the right 1/3 of the shot, it would help a lot. I like the idea though.