Woah, looks pretty badass ^^ I only think the bridge should be wider, atleast 1 sqm, also I see a bug down to the left @ the mountains, blackspot.
What I think would be cool aswell was if u used just a little "flowery walls" on the mountain walls, not to much, but to get a little green, maybe put a tree on thoose empty cliffs aswell that would give it a mighty feeling, and a plant/stone in the water to the right :]
Keep it up!