In the theater, I thought it was a really nice touch that you could get into the stands part, though it's a bit of tricky maneuvering to do so. I had to side-step in moving along the wall to do so.
If the stairs levelled off 3 steps lower, those parts would be more easily usable, though the time needed to change it likely wouldn't be worth it, since those parts can be accessed as is
That was the only thing I'd noticed in it from my bit of playing around even remotely negative, and it's more on the nitpicky side really. I'm only even mentioning it since you asked for feedback.
Overall a very nice tileset, I love the details in the windows, as well as the slightly elevated portions within the different levels.