Nah, drawing maps was fun anyway,I enjoyed myself playing :D if it doesn't have a story, it'd become...simpler but plainer? nbd I think, if the game isn't focused on story in the first place, but with no story it'd be a short one to play.
A coordinate system was actually the first idea that came up last night when I was thinking about my own Twine game. I plan on making a simple puzzle game to test some features in Twine, went finding ideas in other Twine games, and bumped into this one :) It's just that, when I was playing the game, sometimes a button slips and I end up on the wrong tile, only realizing it when banging on the wall, then I thought 'if only there was a way to know if I missed a move or not'...so here I am xD