[Kamaeru]

Yeah, I'd say that overall you had a cool image in mind, and you've only got to keep pushing to get that look to come out in good form. The main problem I see is composition (I.E.: placement of buildings makes little sense)

I would line them up and put a small amount of space between two of them while leaving the others touching.
Some of the tiles just look unfinished by the artist, and I like the vents that you put below the windows. I'm not going to say necessarily that those vents should be above the windows because that is up to the architect, but I can tell you without any doubt that the vents that are in the middle of the windows are really, really out of place and should match the other vents on the buildings. Keep it consistent, you have to think about what a real building would look like from a drafting standpoint.

Make sure the stories of each building are the same height, considering that this building is obviously designed by the same architect you could easily assume that should be the case.