I must admit that I prefer the untextured version of the scene. The moment you slap on those textures (and the signs in particular, at least the writing should be as distorted as the architecture) it suddenly starts looking very fake and cheap. I haven't seen other art for this project and don't know how much you've completed, so it may be too late to change the texturing style for consistency reasons. Ali's take on the background improved it immensely, but I think handdrawn, more organic textures would also add much to the atmosphere.
It doesn't have to be very detailed, just take a piece of paper and some pastel crayons (I'm thinking bluish/grayish colors), do a quick crosshatching with some random suggestion of bricks here and there for the walls. Get another paper and draw a stylized roof tile pattern. Oh, and please whatever you choose to do, try to draw those signs by hand and scan them.
It doesn't have to be very detailed, just take a piece of paper and some pastel crayons (I'm thinking bluish/grayish colors), do a quick crosshatching with some random suggestion of bricks here and there for the walls. Get another paper and draw a stylized roof tile pattern. Oh, and please whatever you choose to do, try to draw those signs by hand and scan them.