That was cool! The art and character design is great. The soundtrack is energetic, yet foreboding. The premise is strong, and the mix of shooter and search gameplay was interesting.
I'm not sure how I feel about the trial-and-error gameplay. I managed to win, but it feels like the lack of knowledge about the area and amount of survivors mostly prolongs the gameplay past the point of novelty. In new runs, it felt like blind luck that I stumbled into new survivors. I don't think there should be a pin-point accurate compass, but maybe a vague "There is a person within a 100m radius" type indicator. Enough ambiguity that it is still a search, but not so much that it becomes stumbling through darkness.
Great work!