Just finished the game...and believe me, if you're looking for some good ol'zombie killing time then you came to the right place. this game is awesome, the sounds are cool, the music is a bit creepy when the guy who "sings" at some point of the song (if it is a song :P) starts to do this screaming like sound but it gives you some kind of "power" to keep on killing those zombies. anyways, the gameplay is cool controls are nice and easy to use, but some points you will be like "oh i am near my home...the horde is here...oh god! do i keep on killin' zombies or go home?" you might wish to stay but if you're near your home just stay away from it, if you want to stay cuz i just ended some pretty awesome waves by just being confused about what to press next for a split second(that was frustrating), oh and THAT OLD MAN he is just awesome, further into the game when you but the awesome weapons he will look like a badass (that's my opinion though, some might not agree with that). That's about it.
P.S: sorry for the long review but after all its the "review" section it should be something worth your while and tell you everything you need to know about the game. ;)