FYI: I've updated the running demo. Lots and lots of work, but a long way to go. Most all the work was in better maps; there's the concept of start and goal rooms, better paths, more decorations, windows, and ...
... major improvements in all the lighting, so there can be tons more lights (windows, over doors, etc.)
Not much done with models. There's a lot of incremental updates to AI and projectiles. AI has some more options (still pretty dumb), more projectile movement types and randomness, the concept of a large "boss" monster (always in the goal room), etc.