To my own surprise I did need the tablet to solve the picture puzzle at the end. (Iofi's first name is Airani???) I think the ambience and general vibe is pretty on point. Somehow it reminds me of a Markiplier video? (Probably because that's where I've seen the most horror games lol)
I did find a wall in the stairwell that simply does not have collision. You can just walk right through it and fall into an endless blue void.
Overall, well done. I like the puzzles.