Good start. However, there are several different styles used and it could benefit from more playing to get some consistency of style. For example, the mountains (overhead, high altitude) don't match the forest texture( some angle, not quite ISO, but not overhead either), does not match the buildings(kind of nice part drawn, part generated effect), does not match the symbolic fields. Don't get me wrong, you have some nice elements in there, but they don't really blend together well.
Assuming the "mountain" is a single mountain in the background, or a large hill, perhaps a good use of shading can help. See Pyrandon' city tutorial for a create example. For the fields, I would probably use something like the texture from Genetica Viewer(agrarian fields or something like that.) or do your own hand drawn. And for forests... well, not quite sure... Anyway, just some suggestions in case you wish to play with this more. If you do want to play with this some more and get other inputs and plan to make changes, let me know and I will move the post to one of the WIP forums (probably city/town building forum)