nice shot... maybe you could have moved the horizon to one of the one-third lines but I wonder how that would look... if you wanted to give more space for the sky, the boy would have to merge with the trees (which means you can't see his dark clothes in the dark background).. else you will have to lose the skies... I can understand the dilema you might have had... ;)
Wonderful feel of cold and desolation. I guess I would suggest a little more light or a little less on the boy. Other then that I like this and hope you do well.