LOL NPC TREES!
Seriously though that was the first thing I noticed. Here are some other things I noticed:
- The door used as a fence gate looks out of place.
- Some of the horizontal fences are missing their shadows.
- The dirt to the right of that fence is very plain, add some different dirt tiles (There are three) and perhaps a stone.
- I don't understand the tree that's inside the house... It doesn't sit well with me.
- The house on the far left looks wonky... The left half is on stilts, but the right halve's roof is overlaping the left's.
- On the left most house here's a pesky green bit in the roof's corner. An image could quickly be made to fix this. I'm sure N-Pulse has one floating around too.
- You've forgotten the tops of the door jambs on the wooden rooved houses. The red roofed house has the top, but the others dont. If you used an image for the top of the door jamb on the leftmost house you could overlap it over the grass and it might look cool.
As for what you could put in the lower half... Perhaps some farming fields? Put some sort of crop in there, that would look neat.
I really like the little bit between the houses with the barrels and the chest and stuff. Keep it up.