Hi Endelyon! I have to admit that Twine Editor is not the best for this kind of games, it was a lot of copy/paste end edit the code.
The format I used is SugarCube 2, the grid layout was set up in the CSS stylesheet (display: grid;) and each passage was placing the player in the proper Span with Id of the X and Y Coordinates (1x1,1x2,1x3  and so on)...It's actually a bit difficult to explain. The step counter logic (as the door buttons)was all made in the Story Javascript at each rendered passage. I spent so much time on this mechanics that I did not have time to write a better narration. I hope you enjoyed though.