I only watched the first video for now, but I'm surprised at both how much I don't remember and how much subtle detail in this game I didn't get. I know I had to resort to a walkthrough several times in the game.
But I blame the rest of the game industry for my ineptitude, for not preparing me to expect such attention to detail! Seriously, I can't remember the last game I played with genuinely creative and designed puzzles. In most games with flaunted puzzle elements I rarely think about what I'm doing. The Zelda games are good example--I hardly ever have to stop and think about how to get a door open, I just do what I was trained to do, that is, place a rock on a button tile, light this torch, shoot this eyeball thing. I often "solve" a puzzle without realizing I'm supposed to be solving one, or without any thought about where I am trying to go or what I am trying to do. It's not that the puzzles are too easy. I'd accept that--it is supposed to be a widely accessible game. But it's like they're not even there.