Hey, first of all great mod!
So I was watching the animation of the dirt/rocks being expelled, and kind of reminded me of things like antlions and such. Then I had an idea.
Have you ever though of implementing random events that can happen in the various digging stages? Like, a bunch of biters appearing from underground because you breached their nest. Or teh hole flooding due to underwater water requiring water to me removed instead of added.. Or you could even have good evemts, like finding modules or mats from ruins underground.
Even in real life digging such a massive hole has its dangers, so I think its pretty appropriate to have those in the world of Factorio
