Nice game and on theme.
When going through the game I just felt that it needed something more to make it more engaging.
You had the scanners that forced you to go into top down view, but there should have also been something that forced you to go into first person view. For example a puzzle on the wall, or some kind of things that moved up and down so you had to shot it down on first person view.
Overall a great entry, had a good time playing it and actually finished it. :)