I’m not sure if others would be interested in this but the Text101 lesson from Learning to Code brought back memories of text-based MUDs I used to play like Dragonrealms and GemstoneIV. Even though they are not as popular as they may have been I’d be interested in a course doing something like that but on a smaller scale.
It’d have the rooms, mobs, inventory, spells/abilities, and all the other options including multiplayer.