It was a great game, it felt like The Last Stand but from a first person perspective, which made it, it's own game. But If I could add a bit of constructive criticism, maybe add a few more scenario's and try to mix things up enemy-wise, like maybe add the odd "special" zombie or maybe even some kind of "boss" every 10 waves. Maybe even add a game-mode or difficulty settings for players that enjoy a tougher challenge. But that being said this was a really great game, kudos.