You still really need to darken up those streets (see Mathias' edit). Right now, it looks like they're made of diamonds. You can't possibly afford, in any time period, to pave your entire town's streets with diamonds.
Also, for now I'm assuming that's the inside of a building, but it's looking rather bland. At first glance, I thought that was a patch of grass surrounded by a fence. It's still pretty bright, as if the sun's hitting it straight-on, so I say do the same thing you did with the streets and try darkening that, too. Consider adding some props, too, but then again that part's just something I'd like to see and not necessarily something you have to do.
