Only a wooden barricade divides you and approaching waves of the undead. The ordinary man in such situation would probably just cut and run, but you were born as a hero, so fleeing would not create a credible impression, just my opinion... Instead, take the rifle and start to liquidate zombies one by one. Even government left here a little help for you, it is their secret weapon, a nuclear bomb that can deal with the whole cities, so why it could not kill the zombies, right? Just read that damn user manual ... Is the shop still open? Great, you will definitely find there useful upgrades for your defense. Have fun.