Great composition!

The fire needs a bit of glow, the stars a a tad too bright, and it looks kind of like lava on the tree.  Still, I like the mood of the piece! 

I really like the colors and the mood of the piece. Agree  with jalonso about stars. Also it seems odd that you can even see them because of campfire. I suggest to completely remove stars around the campfire and lightened areas and maybe add rim of light around them. Here is an

edit

Lovely job overall, as is all your work, serious or experimantal. My only crit after the edits is the BG stars. Don't know if there are too many of them or they are too bright? They seem to take away from the fiery mood.

Wow, I'm surprized that this generated enough interest to get these great comments!  Here's an update with a number of things changed; I redid the fire to look better (I think), warmed the warms up, changed the light on the tree and a few other things.  I think it looks considerably better, but I dunno; I'm kinda tired, so my pixelling isn't what it could be.

Thats really good 

Beautiful.

Light lacks realism because it doesn't fade with distance. If the guy's brightness is ok, fire should be much brighter, tree trunk darker (that orange, maybe even red).

Guy's pose doesn't read as cold, he might be more huddled.

 Very nice.  I like the stark lighting on those branch icicles, whatever they are.

I agree on the fire. Looking at lots of refs is key.

Make the campfire REAL please! Other parts of PA are good but the flat fire kills the magic of image, yep.