BBG claims he does not know how to map, but makes the process easy. As such, I wanted to find out how that fits me. It is a speedmap (not 100 minutes, but still considerable), and is intentionally kept small. I once had an idea for a starting room, and this seemed like a good point to finally draw it, along with some more to actually make it a map.
It starts out with a brick-metal-lava cave and goes over to a small outside area with a -- how else could it be -- brick building. There's lots of imps to trash with the shotgun(s) and fists. Fistfest.
from the gray [brain] cells and otherwise from scratch
DoomBuilder 1.61.311 (yes, it works well with the speed)