The layers and layers of branches and trees really appeal to me, and the missing sections of the trees turns this into a really interesting world with a story. I love the lighting and colors, but I think that your character just kinda fades into the scenery instead of standing out. Maybe you could try a brighter shade of red on the jacket for him\her to make him more noticable?
I also think that the random white lines trailing across the picture are a little distracting, and the picture might be better off without them; but then again, they also give it a more windy, cold, mysterious feeling.
Anyways, this looks like something that would come from a movie <img src="e.deviantart.net/emoticons/s/s…" width="15" height="15" alt="" data-embed-type="emoticon" data-embed-id="391" title=" (Smile)"/> If I could go to this place, I would love to explore this world and the creatures in it.