Some playing around mocking up game world some time ago.
This one is probably my favourite. Did you end up turning it into a game?
Not yet.
Hey chooseusername, nice to have you around the forums!
Those are some great mockups, especially the second and third one. Are these concepts for the new RL you're working on?
Sure, a mini-project prototyping for it. Ticks several boxes including brainstorming, feeling out a visual style while avoiding hand-drawing characters to get around ASCII limitations, and mostly as a goal for set pieces to join together in a later procedural generator.