Just tested it as well and I liked it overall.
Here's my two öre (swedish equivalent of cents, sort of) though, also hidden not to spoil anything.
The overall atmosphere was good and the fog fitted in well. Not too heavy, not too saturated, just perfect.
Also, there seemed to be some bug with the large barrel in the room at the very start, it looked like vertex lighting.
One of the doors in the start was mirrored, so the text was backwards.
The super-reflective barrels were very out of place and had a negative impact in terms of immersion.
It doesn't make sense that some barrels (the M3 ones) were static and shadowed,
while some where constantly illuminated and looked very wet.
The FOV-distortion was a great effect, though it was used in an
odd place, it didn't make much sense to me why the player
character would be scared/had his heart pounding heavily
when there was seemingly nothing scary in sight.
It was a good demonstration though and I imagine it would
work quiet well if used in the right place at the right time.
The teleportation moment had me surprised, it was very unexpected.
And the swedish newspaper on the floor was fun too, for me at least, lol.
I think BVG previously pointed out what some of the headlines meant and such.
Phew, that was all. So, overall it was an impressive demonstration. I hope that the real deal will keep to the same standard, maybe even go a little higher. Great work!