That was certainly an experience... but I thoroughly enjoyed it. You nailed the visuals and the sounds, and they fit really well with the gruesome atmosphere. I especially like the walls that open up when you get closer, that part really adds to the whole artery setting.
I do think the beginning of the game could offer some more direction for the player. It was a bit confusing what to do at first and where to go. The camera is also a little funky - it feels very sensitive and sometimes clips through walls, which makes moving around a lot harder than it should be.
Very good game overall, I'm glad I got to play it to the end. Top notch work on the environment too.