A great start, just needs some fine-tuning...
A great start, pretty slick graphics, just a few things need to be tweaked and you'll have a winner on your hands.
1) He needs to either walk faster or have a run option (I think a run option would be best).
2) Either make him able to jump or climb up low ledges or take the ledges out, because it's frustrating that he can't simply go over a ledge that is only up to his chest.
3) I only gave you a 3 for sound because there was no background music. Now if you didn't put music intentionally, then nevermind, but I think some sort of fast action music or tense, low stealth music would really be a good addition.
4) Figure out a way to reset monsters, or at least have them continuing on their path when they're offscreen, or make someone invincible for the moment after the come out of an elevator. I got killed by a drone before the screen even loaded once because he was next to the elevator and I came out in the same spot.
5) Maybe add a "duck" option.
6) And then do all the rest of the interactivity things such as setting up the prisoners and adding health (which I couldn't seem to find) and you've got something here.
Great job so far, in any case.