For an "alpha" version, that was already pretty impressive! I didn't encounter any bugs during my playthrough. I'm really excited to see what this turns into. The camera feature is awesome (as long as you have paper ^^). The puzzles aren't too difficult, and the little platforming section at the end was a nice surprise.
Special mention goes to the cool night-vision optics and the fact that you always feel like you have complete freedom of movement while still being guided well through the game. Great work, keep it up!