Nice graphics and a very smooth and relaxing feel.
I really like the building visuals, but it is sometimes hard to understand their shape. Especially the ones which have some kind of platform in front of them with some sticks: since these sticks more or less align with the edges of the building I always think that the platform is below the building, and not in front.
I agree that both being able to rotate the buildings and zoom out to see the tower would be nice features.
Bug report: when selecting the building type, the incorrect building (or often none, at least from withing the visible ones) gets highlighted.