I think I understand it correctly. The last active card (not the black joker) can basically have any value, because when you play the last active card on the black joker, the value of the card does not matter; either it matches the joker directly (which would have to be an ace) or it passes (any higher value). The important thing, however, is that the last active card must be adjacent to the black joker either directly or across the edge of the board. Is that correct?
That is correct! Again, I apologize for the miscommunication on my end. I've received quite a few comments about how the game ends, so I need to get a new video up ASAP.
This was actually the last thing I changed about the solo game. Before, I was planning on telling people that the puzzle must have an ace that can access the exit joker. That meant the player would have to identify the problem and fix it, and I did not like that solution. So, I changed the rules to make it a smoother game. Now I just need to communicate that better!