If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
In the shooting game Zombie School Defend you have to protect your school against invading zombies. Kill zombies for cash to upgrade your gear and buy new weapons. Try to survive as long as possible.
Use mouse to aim and shoot.
1-6 to change weapon.
This game is part of a series: Zombie School Defense