Ah what a cool concept! Parallel universes with puzzles that span across them, so cool, would love to see this expanded on! I will say, the puzzle clues did feel a bit simple. They mostly boiled down to "there is a thing in a place, go interact with it", and I feel like a game like this could greatly benefit from some more substantial puzzles. There were some good ones in there though, like [SPOILERS] the puzzle at the back of the hallway with lining up the pictures and the carpets, which took me a bit to figure out (in a good way). But puzzle games are hard (I would know, I've made one before, and it wasn't very good). This is a great effort for 9 days! I will also mention the sounds, or lack thereof. The interaction sounds, though simple, did help, but footstep sounds or just transition sounds when walking between rooms would have helped made the game feel more real, more lively. Also some simple ambient or spooky music could have livened up this game a lot and made it a bit more enjoyable. All that said, I think you nailed some of the most important aspects, like the story, the setting, the overall concept, and fitting with the theme. Great job!