I like some of the single elements like the anatomy and lighting, but all together it looks odd. It looks like she's trying to catch a football. The placement of the tree is also very odd. The way there's no visible floor to ground the tree makes it seem like they're both floating in space. I would also up the contrast on the tree trunk to give it more form. I begins to look like a river over yellow sand towards the bottom. I think the hip to waist ratio is also a bit off, but it can still work.
4/5 on the Spidey scale.