Well I've seen this type of shooter done before in other zombie games found on NG however it seems like this was released possibly early or as a type of study for something more profound in the future. Upgrades easier opponents, longer main character life, faster shooting. Just needs some more time spent on it and it will be like some of the other zombie shooters out there. Not sure if thats what your going for though.
Really needs to be improved.
The difficulty needs to be reduced at the first few levels(armed zombies in the first level,oh come onnn man, and to make matters worse,the character is only armed with a pistol which fires irregularly and the zombies are able to take more shots than the character) and there should be at least an option to change the controls as the movements of,mainly the character,are so unrealistic and the barricades should be upgradable.The concept and animation are not bad,however,it is the execution that lets the game down.