Lol it got me good because I did not expect that jumpscare at all, that was the most random jumpscare ever xd
The game has a very nice build-up, it has a creepy (and ambigous) story, the environment is simple and the monster is original. It all creates the perfect horror setting. But I felt like the build up was for almost nothing, but for a game jam this is expected so I don't blame you lol
The music and the people around were... comforting and it lowered the fear factor. Also the fact that the "jumpscares" were very often drastically reduced the fear level, but I think this was intended. When you took away the music the game became 10x scarier, in any horror game hearing just your footsteps is enough to make you fear what could happen. When that happened I instantly wanted to see if there are still people around, and they were.
Like I said the ending lacked, because all the build up just goes away. I expected all the people to dissapear and the lights too power off or the people turn against you and attack you or some event that will really make the player feel on the edge. I never really felt on the edge mostly because there were people around, and the people were actually alive, I wasn't scared of them because they felt like actual people, like they talked to you, so that made me feel safe. And in a horror game you have to make the player feel safe and then just take that away. This is the best way to build up for the ending.
Anyway, It was just unsatisfying for the player to end the game like this, because we play horror game to get scared xd
For a game jam I think it turned out really good! I really liked that you kept your style and didn't just copy others, the game feels original! Good job and I hope to see more horror games from you :)