It's a layered background, you can move those layers as you want. (The sky is separated from the town). Unfortunately, as I told before I do not have enough time to add basement for all those buildings. So yes, you are right, you can use it only as a view from top. Anyway, it's an asset pack, its point is to test the first mechanincs and I am just trying to keep this process enjoyable. I respect your argument, in my next assets I will try to avoid such things.
This pack has arches, merlons and columns. The basics to make your level look good.