There are Better
The map, the barricade....... Reminds me of the Last Stand. Which is an amazing game. I cant help comparing the two even though this one has slightly different game mechanics. the Last Stand is definitely better.
First off, the graphics weren't bad, but I felt that they lacked polish. Just certain things didn't seem to be right. Some animations weren't smooth and so forth. When killed they seem to turn to stone, I know a complicated rag doll physics system isn't required but a little extra bit of animation would have gone a long way.
Also, The game really isn't even that hard. Spamming a melee weapon makes it easy. Never buy a gun. Ever.