Extermal Shatbax

Four years ago, bad chemists on earth released a medicine "Extermal Shatbax" and poisoned people, who turned into zombies. Only one survived, whose mission is to get out of the earth and survive.
Shoot to survive.
Six Teleports to survive.
Destroy Extermal Shatbax to win the game.
Player can run fuster, fly by helicopters.
Quality optimization.
For shooting player have guns, "AK47", "M4A1".
Collect bullets to shoot your opponent.