If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Shoot Zombies in this Ben 10 game. Zombies are on killing spree. Shoot all zombies and kill them. Upgrade your weapons in the store. upgrade your health, if the status shows danger. Play game in three challenging mode - normal for beginners, hard and experienced for experienced gamers. All the best !