Fantastic Game dude, 10/10. The puzzles are not hard to the point of being frustrating and are really satisfying to solve and I have a soft spot for the sound design not even being sarcastic...  So I don't know whether this is an intended feature of the game, or whether it is a glitch, but when I hover over the vent in the girl's room upstairs, it says "hand button: Inspect Vent" which suggests you can click it but whenever I clicked it, nothing happened. In my first playthrough, when I solved the AC puzzle, I intuitively went to the vent in the girl's room instead of the actual vent with the key,  because I thought it would be the one with the key. I did figure it out eventually so no big deal, just thought I'd let you know

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This happened in multiple playthroughs

I play in browser