There's a lot to like here. The game handles very well. The wall textures are interesting to look at, and the visual design overall coheres well. The sound design is immersive. The save/continue function is very helpful. The level design does a good job of subtly landmarking (for example, by making rooms different shapes and adding different colored lights) so that I didn't get lost, even though there's no map and I have no sense of direction.
Alas, this was too difficult for me. I got the hang of shooting the enemies from the shadows, dashing across the lit areas, and then using my flashlight only when necessary, but I still couldn't avoid constantly dying. :)
One minor criticism: I found the way the text quickly unfolded to be a bit distracting. Maybe it should move a bit more slowly.