Nice work! Repped
If I may nitpick a little bit: the cast shadows on the wall don't quite touch the base of it, which makes the wall seem to float. If you did this in photoshop, you can easily tweak this in the drop shadow layer effects dialogue. At the same time, the forest has no cast shadow. Since trees are often a good bit taller than buildings, those shadow should probably be longer than the ones on the walls.