Well, the terrain... it looks kinda... weird? Yea, a little bit weird, and random. You should replace those trees, they don't looks so good on the picture. And those houses... uhh, they don't look like they're houses at all... well, they look like houses, but they look like toy houses
But I like those towers/hills in the background, they really look nice
EDIT: oh yea, and that ''river'', also needs work