If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Some of the people in your little, quiet town got sick from an unknown disease and died in pains, and now others got sick apparently for no reason. You are their only hope because you've decided to go where nobody was before, in the Nuclear Valley. The only vehicle that is usable it's the loader truck. It's good that you have a driving license. Drive the truck, kill soldiers on your way, collect the nuclear weapons and attack a whole army. Drive away from infected territories, make your way through the soldiers, lined up to defense their unit. Smash them, get more and more nuclear weapons, upgrade your tractor and stay away from the launched bombs. Have fun in the Death Valley!