If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Zombies are unbelievably rude. They are after your air-purifier so stop them before they get it! Trap, shoot, beat and blow up zombies in this Zombie survival game - Zombie Trapper 2. Use cunning trap placement and increasingly powerful guns to stop the walking brainless savages.