This was a great game, it felt like a proper game to in gameplay and execution. I liked the small events to give the it some flavor. I managed to get 25 in each resource before I was unable to dig any lower, at a certain point if I dig down there won't be any slaves/lit torches anymore so there seemed to be a hard limit on how deep you can go xD
I don't know what I can say in terms of improving it, I don't know how important the supports are, if they just support the hex it's in or if they help with the surrounding space as well. It would have been helpful to have some way to check the risk of collapse, like a "heatmap" that can be toggled.