I got just past the first appearance, and the light moved further down the table, and couldn't figure out what to do from there. No objective was showing, so I figured I had completed the demo. Definitely left me a bit spooked! the long silences and being forced to explore in the darkness really raised tension! I think you have an interesting concept here. The fact that it was a 3D environment with a flat 2D character didn't really bother me at all, although the lack of any camera controls or camera angles on the things I was interacting with did bother me. Also, it would be nice if the first time you click when the dialogue is typing out, it would just complete the dialogue message instead of skipping it. The typing speed was fast, but when you get the same dialogue again it's nice to be able to skip over that while quickly scanning for any new information. Also, does have a couple of spelling errors and the click-to-interact message is in Spanish, I believe.
There are a lot of opportunities for horror! You could even keep track of how many times a player enters and exits a room and throw in little jump scares based on how much they are pacing around trying to find the next clue. Lots of potential, keep up the great work!