Fun and Original...Few problems though...
I really liked the concept behind this game, and the gameplay was reasonably solid. The only thing I didn't like was how inefficient it was to swap weapons. It really takes a long time to move your hand from the attack key to the weapon key and back to the attack key. Now, yes, I know that in reality it's less than a second. But when you've got a half a dozen guys on you and one of them sucks your life faster than the life pump from "The Princess Bride", half a second is a lifetime. Literally.
I still enjoyed, though.