Great music, cool sounds, cool zombies and polished / funny art style with highscores and extra click-the-zombie feature deserves in my opinion 4 stars, but not five since the gameplay lacks true variety, sounds stutter when spamming the 4 gamebuttons when rushed by alot of zombies and the controls feel unresponsive after five or so levels.
Nevertheless, this is a great game to try, especially for zombie lovers :)