Just noticed that the AC and Antenna would have to be installed with people on top so there should be some safety.
Such as a Parapet (aka low wall) that surrounds the building so it look's more realistic.
I suggest dropping the inside to keep the same height instead of adding in Walls.
This was actually in my original idea, but I guess I forgot to add it in. It's there now, as well as what's supposed to be a silhouette of a man standing on the edge of the building (I did this rather quickly)
Here's the moon in a different colour to the windows, as people have suggested.
Here the windows are a different but very similar colour to the moon.
I like the latter more, to me the moon just looks right when it's yellow.