A very interesting experiment!
Unfortunately, being perfectly honest, the experience was hampered pretty badly for me by the noise used for writing text on the screen hurting my ears pretty bad even on my lowest possible volume setting. I'm not sure if it's perhaps an inadvertent consequence of playing directly via the page rather than the ROM version of the game, but the lack of any other sound other than that forced me to mute it a couple ways in and I can't help but feel like that caused me to miss some of the more important scares as a result.
I'm a big fan of the story's ending twist, however. It wrapped things up in a way that nicely changes the vibe of the story. It's funny that purkka mentioned creepypasta, because it reminded me a lot of the ending to the old Smiledog.jpg story.
Overall, I definitely feel like this one could've been a lot better with some polish, but frankly just the fact that it exists feels impressive enough.