Cowboy Shoot Zombies is a simple shooting game with a pretty hard-core Cowboy and a lot of shooting. You can play it online and for free on Silvergames.com. There are only two buttons for you to choose from, so either jump or shoot, easy as that. Use your mouse to activate the buttons and act fast, so those zombies don't get you first.
You can even collect a horse and ride on it for a while. Once you are on the horse there is no need to shoot the zombies anymore, as they will be run down by the horse. Try to collect as many coins as possible and survive for as long as you can. Run, jump, collect money and shoot all zombies on your way! Ready? Much fun with Cowboy Shoot Zombies!