I liked the graphics of the game, and the balance between dark and lit areas because it is annoying when games become too dark to even see what's going on.
Some things i want to point out
1. When zombie attacked me and i lost some health, the dark atmosphere, plus the screen with blood splatter made it difficult to see anything around. Also bullets and machete didn't work.
2. Its a lot of find this key and open the door to move on and do the same thing again, i hope you add interactable things other than that to make it more interesting.
Besides that, as an architecture student, i found some details in the game pretty interesting, for eg, the narrow staircases which did create an uncomfortable environment.
Gladly waiting for the full game! All the best.