Hello,
just a heads up, when you're small, if you try to get in the right jumpscare door and keep going forward, you can noclip and go anywhere you want.
Also I solved the fourth (incorrectly spelled forth) clock optional puzzle, but nothing happened apart from (spoiler!) the picture changing. Is it supposed to be interactive? On macOS I can't interact with it.
While noclipping I saw there is a key inside the "grey" picture, but I don't see any way to reach it. Is it somehow, or shall I tell my kid that we finished the manor and we're good? :D