ZombieLand is a comedy horror film that takes place in a post-apocalyptic world overrun by zombies. It follows the story of several survivors, each with their own set of rules for staying alive. The film uses flashbacks to develop characters and explain their backstories, allowing it to get straight into action scenes. It also makes the audience care about the characters through learning their motivations and past lives. Character relationships are built up over the film, and they face sacrifices to test these new bonds. This helps drive the plot and ensures the audience remains interested in the outcome.