When the biggest part of the Earth's population have turned into zombies they then mutated into zombies that shop for the unusual groceries. It is your job to create the first successful Zombie Mart. Just like any other grocery store you are expected to set up booths filled with things that the zombies want, hire staff to stock theses booths, hire a cashier, order the stock, and even hire security to catch zombie thieves. Also, you need to renovate the place when you get more money and make it look nice. Just because they are dead does not mean they do not deserve the same shopping experience you would enjoy.