Oh wow such a cool creepy game! I'm proud of myself that I managed to finish in 3rd attempt because if I haven't I don't think I'd have the guts to try it again.
Tho, I almost though that there was no fullscreen option at start. I expected it to be in f4 (cuz undertale), but it was in f3. Maybe you should write it in the title screen too. I know there is also settings in the title screen but it is hard to notice it when the window is so small.