Good submission.
Very much appreciated the ambience and atmosphere you created. Good choice of music/ambient noise and the right amount of fog to obscure the players vision without making the game completely unplayable. Got jump-scared by the first zombie I encountered, snuch right behind me. Matches the theme well too.
For improvements, maybe add another game mechanic e.g. a way to trap zombies, a different type of zombie, etc. to add more depth to the gameplay.
Nice job!