First things first: the build up of scares was absolutely fantastic. I got goosebumps! The music, visual effects, the graphics, everything was pitch perfect, up until the very end.
(Spoilers)
Maybe this is a little harsh, but in my mind there's nothing worse than a horror game that needs to throroughly explain itself. The dialogue with the developer at the end destroys the tone that was being built up the whole time, because it undermines all the creepiness with incredibly tired horror cliches. I feel like it's much scarier when you don't fully understand what's going on - like did we really need an explanation even for the record player of all things? That said, I totally understand that this is a game jam game and you didn't have the most time to work on it, so I don't want to judge too much; I just really like it when horror games take a more subtle approach.