@rezzyreksya yeah, I agree that once the witness grows into an "open world" it can become confusing, but my impression on Blow's puzzle building experience is: if the current one seems to be using different mechanics than you've used so far, it means that you're off the path he planned for the players, and it's just a matter of finding that. Maybe that's a terrible combination with the "open world" concept, but I see him using it again in the game he's working on currently (a Sokoban like).