I wanna start by saying I love the sfx. Hearing the zombies' footsteps in the direction relative to the player is a nice little touch, don't know if that's just a thing inherent to the engine or what but I like it. Graphics are also really nice!
In terms of the gameplay, I know I'm not the first to say it, but definitely a bit easy. I immediately ran out of ammo cus I wanted to shoot the gun and I didn't see the counter initially, which is totally my fault. I just wish that decision of mine would have put me in a more dangerous position, but instead I could just outrun the zombies so it wasn't really a big deal. Maybe the zombies could have gotten a bit faster with each doll you collect?
Other than that, some quality of life stuff would have been appreciated. Like someone else said, maybe a tracker for the dolls, or they could emit a sound when you get near them. I liked the volcano concept, I was hoping I could walk into the volcano right off the bat. :P After I beat the game, I went to see if I could, then when I realized I couldn't, I also realized there wasn't a pause menu for me to quit the game through.
Just little things to consider for the next game!