Gloom Sewers 1024 by Mephisto
I drew this WAD with the random generator - looks to have been submitted to a 1024^2 map units competition. And it was pretty fun. Doomgods won't find it challenging at all, but that title wouldn't apply to me.
I recorded a video of my first playthrough - it's a bit choppy, and if I'm going to continue doing this I'll need to upgrade my system or figure out how to optimize OBS - but I hope you enjoy it.