This is an interesting idea. However, in creating a visual dungeon crawler with ascii or art, what about those blind players who can't see but who will still want to crawl the dungeon via text?
This was a jam game I made in 72 hours in October to see if the basics of a mechanic I had thought about were actually possible in Twine, especially considering my Twine programming knowledge at the time. The game is partly an homage to a game called Eye Of The Beholder, which was made in the 1990s, in a way that I could make it because I can't yet make games in Unity or Godot, for example. I wanted to see if I could recreate that game's feeling in Twine of clicking through a pixel dungeon, even though Twine isn't usually known for that sort of game. I actually did think about blind people but that's a whole other level of complexity that I didn't have time to solve during the jam. Therefore I intentionally didn't mark this as a blind-friendly game (only colour-blind friendly) in itch.io's system.
One option would have been sound, which I didn't even get to at all - not even sound creation, nevermind programming - and, in fact, I did not even have the programming skill for until January, where I finally figured out some stuff while working on another game.
Again, this was a jam game and I had a specific visual mechanic that I was trying to build in a constrained timeframe as a learning experience. Other games I've made (The Light At The Frankenstein Place and The Time Machine, for example) are straight text adventures that only have a little bit of decorative art and therefore should work well with screen readers.