I recognized Mixamo? I used the same page in my game! ;)
Really like your game! The atmosphere is creepy, the sounds and music are perfect for the game,
I would recommend some visual effect when you are injured, like some blood in the border of the screen, or something like that. When you are immersed in the game, killing zombies left and right, you don't pay attention to your health bar.
Will you expand it after the jam? Please, do so!