nicely framed with the birch. If I may be picky...it looks like you processed the eyes(which look good, btw), perhaps doing the teeth as well would have kicked a photo up a point- or two.
I like the way you used the trees for framing. For some reason her face doesn't really jump out here. Is it the surrounding color inside the hood maybe? Hard to explain, it seems like her face isn't "bright" enough - not necessarily exposure. Need that gleem in her eyes...maybe not sharp enough? Sorry for the questions. Just kind of thinking out loud. Good luck in the challenge.
i like your idea ... very creative. had it been me, i would have cropped the shot around her hood and. it would have been more symmetrical and we could have enjoyed the portrait and detail in her face more. but i like it, gave you an 8.