[Lord Sephiroth]

It's a neat effect, not something that hasn't been attempted before, but unfortunately that kind of style leads to rather monstrous or ugly houses, much like the one in your level. (Not calling it ugly, just saying its practically half the level).

I forget my point, but I think the style has been attempted by every designer at one point or another, and at some point they realize that theres better options. Making the insides shaped the same as the outside, rather than the exact same size as it appears on the overworld, for example.