Shiver Star, the game's 5th world, appears to be a frozen-over version of Earth, containing several uninhabited urban areas. Nintendo has confirmed that Shiver Star was once inhabited, but the climate drove them to evacuate the planet. This has led fans to speculate that Shiver Star is a post-apocalyptic version of Earth. Though Nintendo's intentions during the making of Shiver Star remains unknown, it can be inferred that the world is either a message about climate change, or the suggestion that the "Kirby" series takes place in our own universe.