https://www.doomworld.com/idgames/levels/doom2/Ports/megawads/nosp   32 speedmaps, all made in the span of 20 - 40 minutes over the course of 2 weeks with mostly slaughter gameplay. There is a general theme for each episode regarding health and armor, with the first two being the most difficult (1 megasphere, and no health). Play at your own risk.   Some in-game (gzdoom) screenshots: