Ugh. Mental notes: Do not try detailed cracked up floors again. At least until a good method for their drawing is developed. They just don't work otherwise. And menacing drop shadows require at least some kind of idea of how the overshadowing object actually looks, and how drop shadows actually work. More research needed.
The most defining quality of my full-scene pieces tends to be "looks twice as good at half the resolution".
I likely won't be submitting this one for anything. Not quite in the theme of the challenge, and not refined enough for the drawfriend.