As others have pointed out, you nailed the tense, horror atmosphere with the lighting and the music. Amazing to see NPCs that follow you in a gamejam game! When I first saw survivors Im ashamed to say I fired upon them thinking they were guards.
I was a bit unused to the control scheme. Perhaps making use of the mouse as the directional movement, and WASD as forward/strafe might be more intuitive for players familiar with the topdown shooter genre.