I just downloaded it and played through the first level... man, I surely would've pay for this game. It's clearly unfinished, it has no music beyond the main menu and the gameplay itself was clearly not meant to be played with a mouse and keyboard, but it works pretty good and the graphics are alright and charming at times.
It's Cow Zombie's classic humor through and through. If you've played Ben There, Dan That and/or Time Gentlemen, Please!, it's that kind of tounge in cheeck humor. For free, this game is a complete steal and it's a 100 mb download, you owe it to yourself to give it a try, it even has achievements for crying out loud!.