I love those city icons; for the roads, maybe give them a tiny bit of color, to make them stand out a bit? As far as the forest go, it's a really cool idea to combine different types of woodland in the subtle way you've done. I personally like the way they both look, but it looks a bit odd with that abrupt transition, the two types separated by a road. What about having a couple of forests where they blend, where you can see the color and style change from north to south?