The document describes a game called "Mutant Cakes Attack" where the player controls a ninja. The goal is to defeat mutant cakes that are taking over four different worlds - Country, Residential, Industrial, and City. In each world, the player must discover abilities, find weapons, and defeat mutant cake bosses. If the player can defeat the final boss in the City world, they will win the game. The game uses a fold-back narrative structure that lets players explore each world freely but must eventually face the boss to advance.