Backer from Kickstarter here. Its a real interesting game.  If you need a solo game to kill some time with I'd recommend it. Also the authors other projects. It's a laid back game that gets your creative juices flowing and if you play ttrpgs you end up with a neat map you can use. 

I've read were people use it as a journaling project. Writing as they go. In the persona of a dwarven mine boss. 

Or we're some one wanted a bigger deeper map when they were done so they made each sheet of grid paper a lvl of the mine. Expanding across each sheet as one level. Then  moving to a new grid sheet for the next lvl down. Use your imagination a little and it can turn from a fun and interesting little game into a fun personal project. I'm sure it'll have you coming back again and again 😊