Well done, this way of working seems very good 
Very very nice work!
I am working on a kit that will be made if sub pieces,
each sub piece is to be under 128 vertex, and reused a bunch, this way the pieces can be instances,
like basically making modular legos and building a world with it.
Have you seen the pythonic dungeon geberator by Battery?
it’s in game engine resources, but you could procedurally populate a world using your tile set. For export or for use in the native BGE 
Hi, thanks,
my goal is to make as many geometry peaces to make complex enough & “exquisitely” enough game levels and game objects.