Looks great.
Reminds me of a generator I've seen before, can't recall the name, but better.

A suggestion, if I may, if you're on Photoshop I'd suggest using a Bevel and emboss layer style to the rooftops. If you play with the settings a bit you'll add a lot of depth to the buildings. I'd make it pretty subtle, as to not overpower the look you're going for.


Regardless of my suggestion, great work!