I think this is a stretch to put it this type of game into the horror genre. I think more would have to be done with an active monster or something trying to impede you getting to the finish.
I didn't quite like the controls of not being able to look around. The movement also felt quite odd in general.
I could basically ignore the zombies completely. I wish there was some indicator to the closest doll, or at least some map or an initial overview so I knew where the links to the next islands were.
There is potential as a sort of explore, collect, and shoot type of game, but more reliance on the bullets and possibility to be killed needs to be there.
