Like the atmosphere and setting. Would definitely like to see more.
A few suggestions for improvement:
1) Ability to control x, y look sensitivity would be beneficial. Y was too slow for me, while x was zipping around so quick it was giving me motion sickness.
2) The run action is in general too slow and doesn't last nearly long enough to be of any use. This is especially egregious as the sound causes instant detection.
3) Monster in first area is way too sensitive to sound and much too fast for the size of the area and the slow character movement speed. I essentially got stuck in this area, as I would either try to move while crouching and eventually get caught by the AI randomly patrolling or would try to walk through and get detected.