Zombienguins Attack

Game description: 

A lot of animals are suffering because of environmental pollution and not only close to the big cities but also in such remote places like the North Pole. Bad people have thrown tanks with toxic waste directly on the penguins that were carefree resting on an ice floe. The liquid from the tank sprayed on penguins and they began to turn in horrible monsters. Because of human indifference you have to destroy all the penguins-zombies using round stones or snowballs. Try to use as less as possible shots and earn maximum points.