Awesome game.
Excellent graphics, not too long or short, really cool how you find survivors and weapons, and the weapons were all pretty cool.
Some minor things that would make it better are: 1)Make it take more time to repair the barricade, because as it is, you hardly ever have to repair it and when you do, you only need an hour or two at the most; 2)Let us upgrade our survivors or change their weapons; 3) Make it more difficult! For the most part, the game was very easy because of the hunting rifle and the Barett at the end, so have more enemies with armor and maybe a few with guns that attack from a distance; 4) More weapons. Maybe add in hand grenades, or a rocket launcher, or a Minigun, or a flamethrower. Whatever you can think of, just give us MORE!
As I said, excellent game, hopefully you make a sequel and include some of the things I mentioned, because you seem to be extremely talented to make a game this awesome in the first place. Good job, and good luck with future submissions!