Good demo, but...
there are 2 glitches.
1. I don't know if I'd call this a glitch, but you can just go around and click the "move buttons" instead of shooting anybody. It's more efficient to just click them instead of shooting the enemies. What I'd do is make it so that they only appear when every1 is dead.
2. This one is hard to describe. When you have the Dragunov, you can zoom in, press space, and then the crosshairs disappear, but you are still zoomed in, making it nearly impossible to proceed. It might be in the one "room" I was in. I was in the place where there is the guy you're supposed to kill to beat the mission.
Besides the 2 glitches, this was a pretty dern' good game. The graphics are greater than anything I could currently make. I like the fact that the levels are interactive, adding to the freedom of the game. Now, I doubt that you want me to go through every little good thing in the game, because that would take quite a while, so, long story short, this is a very good game with a couple glitches. Keep up the good work and this would definitely be a 10/10.