Cool soundtrack, creative use of the O2A2 limitations (especially using a flashlight on 1 BG). The game was short but it packed so much tension in it, probably the most exciting and stimulating of the games I've tried in the jam, I played it at least 2 times. Then, I checked out the spoilers, had a big "Oooooooh" moment...
A few more remarks. You can consider not having the MC's "name" displayed if that's just them thinking to separate their thoughts and spoken words. Also, an idea came to mind that, using persistent variables, maybe the MC can be the "6th" in the next playthrough. Just an idea.