While I'm painting in photoshop instead of pixelling (I can't.. I suck at it), I'm only using a few colors (brown, red, black, green).
Also, I don't like the two orthogonals making a point at the edge of the picture plane... it was supposed to be a decorative line of bricks, but doesn't look like it. And the dark side of the building foreshortens too abruptly, so I'll make the vanishing point farther away. The trees in the background aren't finished and the texture on the building is supposed to be old, plaster cracked in places to reveal brick underneath.
Also, the building to the far left doesn't really read, so I'm thinking of getting rid of it or attaching it to the main building.
Okay, think that's all I can see at the moment. Any c&c is helpful, especially as far as suggestions go for any of the above, since I'm kinda stuck.