Sniper Zombie Apocalypse (Pixel Shooter)

The world has been invaded by a Zombie attack, and you as an experienced sniper, you must end them all.
Show your aim and your pulse.
You must first pass through a training phase. And when you are ready you will go out to fight the areas invaded by the zombies.
Your aim with the sniper rifle will be decisive in each of the missions.
In addition, you must think and value the priorities in completing the mission within the allotted time.
Each mission is a new challenge of skill and dexterity.