[LightningAlex]

Wow, those are some really nice ideas. I can't wait to see them develop more!
As for the town, you could, for starters, put a road xD Also, the fence on the left is kinda unnecessary - better to put it around the entire town. Also, a fence around that thug spot would look cool, too.

As for the underground map, a few more "layers" of cave walls would look extremely good. Also, how do you reach the house? I don't see any stairs or caves leading to it xD