I like the first one. My only complain is about the tree. I 'd expect a monument up there. Unless it is a holy tree. (Hope you understand: Tree under which Buddha was meditating, apostle X was preaching...) Then it should be much bigger to fit with its age. Ooops: There is a dent on NW edge. Maybe my rabbit though it was food...
About the park with trees: Yes they are small, but it might be their kind, or they are just young or cut from the gardener. Only the shape and their solid volume puzzles me. I think their should be some pixels here and there of different color and some empty ones.
For the third building, I cannot guess its usage. Suppose it suits in TTD Mars.
lordazamath: I didn't know you have such talent in 8bit graphics. Congratulations!