I like the piece, but I do have a teeny tiny criticism. For me, the whole piece flows together very well, with my eye kind of sweeping along the cliff in the middle only stopping to look at the glinting edge of the building, so that's great.
But the part that is a bit of a problem for me is the portion at the front with the figure. I don't know if you wanted the figure to be the focus, but it does get a little bit distracting. It stands out a bit too much because everything else is faded and behind the veil of fog, but that portion is bare and exposed, and I would prefer if my eye focused else where, to the more polished, interesting parts of the piece.
My solution would be to either subdue the figure and his mountain, or to get rid of that portion entirely and just let the focus be on the mountains and building in the distance, which have enough to interest me without the little man in the front.
So there you go. I do really like the piece anyways!