I really like the mountains you've done. Also, the trees (each type) look interesting as well, maybe mix them together?
The wall looks really good, but I worry that it too closely resembles the cliff to the east (or vice versa).
The rivers are a bit too smooth, I would think and the water labelling...I don't like it so much, but can't put a finger on the why of it.
The border also looks great.
It's called a compass rose and the lower one looks really nice.
I look forward to seeing this develop! Have some rep!