I like the sound effects, and the movement controls work as advertised. I almost got stuck inside of the tutorial, when I couldn't figure out that you need to lockpick the vent shaft and then go into it while crouched.
I'm not sure what purpose the crouch serves other than to offer a different way to get around? It would be great if it were more meaningful from a gameplay perspective.
I also got attacked immediately upon emerging from the ventilator shaft, and then promptly died. I wasn't sure how to fight the first enemy.