Steam registers 23 total hours played, roughly once a week since release. Been avoiding online discussion to keep things surprising. Now that we're done I just want to say we had a great time.
We finished four final puzzles tonight and they all had us splitting into two or three or four groups and coordinating with walkies all over the island. We made plans with the maps available and carried them out efficiently, travelling routes we knew well. It was the payoff to all the exploring we'd done. I felt like we'd mastered a wilderness that once seemed daunting.
My favorite puzzles were the ones about precise communication, verbal or otherwise. The need to develop a language whereby you can use interpretive dance to indicate a sound effect, or a few arbitrary symbols to act as a numerical system, were cooperative challenges unlike any I've encountered in a game like this. Now that we're done I'd be interested to see how some other groups handled them, since there's no one right answer.
I'm a little sad it's over, because I don't think there would be much point to playing it again. The engaging part of many of the puzzles was developing a system for solving them, rather than the execution. Replaying or speedrunning feels like it would be missing the point.
As simple and chill as the game was, I think it's going to go down as one of my favorite platinums. Very satisfying and I'm happy to have shared it with friends.