Great! I followed the elphyl account, so I will definitely stay tuned!
[Spoiler follows]
The puzzle I was referring to was Puzzle 25: if that one doesn't strike you as notably different from all the other puzzles in this game, then there's probably an unintended second solution. I'm trying to spoil as little as possible in these comments out of respect for the game and its players, but I'm also happy to describe that solution if it was indeed unintended and the spoiler doesn't bother you.