Sniper Tower Nice for a first timer.
That was a time killer, Not too bad. Nothing really new though.
The sniper was too much of a machinegun too easy to kill Nazi's.
You could make better graphics, maybe add an effect when you shoot someone in an area making them fall a certain way, like hit the leg and they fall to their knees or something. Also maybe a cool cutscene when you do a headshot.
Try putting some more sound (it is a warzone you know) maybe music to make the players heart skip.
Try something new, their are many shooting games, but maybe you could add a little twist once you gain more experience with flash.