Hmm. Good start; the grass texture is quite good, but you're right in that the buildings do seem flat-out fake.
Lose the blur/glow on the buildings, and try to balance your colours/levels (the buildings have such bright colours - same with the river!) Also, should the road be thicker than entire buildings? And why don't the homes have yards/gardens/paths up to them?
Hope that helps at all.
PS - I'm not sure if the green bumpy texture is supposed to be trees, jungle, overgrown shrubs and grasses, rolling hills, or forested mountains.