The theme is definitely there, I like the darkness. Like someone else said, while cool, the visual filter can make it a little too tough to see things.
As far as gameplay, I knew I had to destroy totems, but the tips and notes were very confusing to read and for that reason, I didn't really know how anything worked. Getting the writing here cleaned up and making things a bit more clear would do wonders for playability. On my first playthrough I was sitting in the camera room and lost for seemingly no reason. On the second, I walked to all the rooms and there were no totems.
You've got the visual design down for sure! Just a few kinks in the gameplay and writing department to iron out that could bring this game to the next level.