We are supposed to be underground. And the rocks represent particularly hard to dig places.Even the map, like where are we supposed to be? we are in a big empty crater that has nothing in it but moon rocks and iff you look up yo ucan see the Norther aurora lights what the fuck?
The main flaw of this game, in my opinion, is that you can't take your time and observe the sex. Not even with all the automation. That is a problem for a number of other games, but here it's much worse than in Monster Black Market.