Ok, so this post is a joke of some kind (there was no 1989 version of Blue Prince). But it raises an interesting question: would it have been possible to implement that upside down floppy disk puzzle in a game? 1. Was it even possible to insert floppy disks upside down? I lived through the floppy disk era in my childhood, but I have to admit I can't remember if the drives would even let you do this. 2. If the answer…
Semi-related; One of the Zelda DS games required you to close the DS (so the top and bottom screen met), which moved a mark from the top to bottom screen. Was infuriating for me, only figured it out after closing the DS in frustration. Not really something you can do with modern portables, but clever in retrospect.