Pretty awesome for your first flash game
I really enjoy playing this. Only bad thing is the lack of a save feature. I was playing the game at 5:00am this morning, I achieved so much.. but I was so tired and just had to stop playing so I could get some sleep. It was disappointing because I was doing so well too (I had 6 survivors and quite an impressive selection of wapons and 100% barricade).
If you do so happen to make a sequal, it'd be nice if you added a save feature to it. Anywho, despite that, I love this game. 7/10