Having floors, I think that's what's missing in this game. Being able to build real houses, or dungeons, or even watchtowers. With a layer-by-level system like The Sims or Dwarf Fortress. We could also dig deep to find ores, watch out for landslides by putting columns. It looks really cool and will add almost endless construction.
Excuse my English, im not English.
https://steamcommunity.com/sharedfiles/filedetails/?id=2127428910&searchtext=Z-Levels