Hit Zombie Cow description

Who has never played or seen playing Whack-A-Mole in the playroom, the game where you had to smash the heads of moles constantly coming out of their holes? Probably very few.
Whack a Zombie Cow is an exiting of Whack-A-Mole game, Use the hammer to hit the zombie cow in the head as faster as you can. The more cows you hit the more point you get.