ok so the hole right now before you properly enter the long corridor to the final battle, the mouse hole allows the user to see mother in the bed and the final battle arena, i suggest those who want to explore it to do it, i am avoiding spoilers for those who do it
as for game play, i would like the sprinting option to be back but moves x2 as fast when going through the rat hole and general movement to avoid mother in the first chase sequence, the thrill to run around the room only to see that it is inevitable, to then hide under the sheets was fun, or even behind the music box again, finding that out was both stupid and fun, because logically you can see someone under the sheets even if there isn't much light in the room, so the kid could be behind the box and look like nothing at all. there is opportunity for more gameplay or a resume game. a game that shows everything you have done or can do, that will be cool to see in the future. but it is just me, a simple mind learning coding because it is fun to solve problems.