Looks very good. Awesome productivity, I'm glad you are getting along with your tablet. I also found that a tablet is much a better option than a mouse for drawing.

A couple of thoughts on that steep descent from the city walls on your west side. The road leading to the gates could wind in an curve (or an S), instead of going straight uphill. That alone would suggest a steep descent/ascent, but you could also shade it a little more. As it is it's rather bright... refer to that image someone made right at the start of the city, with roofs in every direction, to see how much you could/should shade.
Anyway, that's all InMyHumbleOpinion.