Hi joel, thanks for playing! The game is using RNG to spawn the stairs on broken rocks. Feedback taken that we could reduce the number of rocks and make it less punishing for the earlier floors :)
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I don't understand your comment, basically the clock says "highest depth:0", and every expedition is the same floor variation with rock/bronze/bats/slime. To start the expedition it only says "Floor 12" and I can't change it, so I don't know how to progress
EDIT: Ok after reading a comment I saw you have to break rocks in one of the room to uncover stairs underneath. I don't know how I was supposed to know that, I thought we were just collecting resources