Great game, I'm thoroughly enjoying it so far.
The only thing that I'd improve, would be the speed that the mouse camera moves at. It's very slow, so either an option to adjust the speed, or the speed it up a little to fall in line with other games would be great.
It would also be nice to have additional graphics options on PC, but that's not a big issue.
Apart from that, a great game, very innovative and interesting.