Good game, this one must have taken a lot of effort! It's very ambitious for a jam game. I like that there are multiple mechanics to play around with (lighting torches, music box, etc.). The atmosphere is great and the part with Kagerou and the book was scary!
The stealth mechanics became a little frustrating after a while though. The enemies feel unpredictable at times and juggling two items at once was a bit hard to handle. Other than that I had a lot of fun!

some minor things:
the first lock can be bypassed without a key
the green key multiplies when picked up (kinda funny)