Alright! Now it make sense! The Demon is on the left, that was a good clue :D
Again, cool idea! It would benefit of a redesign to enable some actual tactic:
- joined: it's only a matter of surviving, there's little tactic other than hoping that enough cards come up that don't kill you both
- unjoined: I feel like there's too much luck involved as it is right now. Maybe the human could somehow hint about the next action.