I'd tell you how I liked it, but there's big green triangles on everything I look at: guns, enemies, myself.... Anyway, you should add a crouching system. I dunno. Seems like a good game, if a little unforgiving in the grenades part.
I still love this game. One thing, though, there ARE going to be other enemies, right? Because I can only get whooped by those zombies for so long before I get aggravated, lol. Good game, hope to see the next demo soon.