Players assume the role of Ol’ Master Ninja in defending Ninjatown after Mr. Demon and his minions launch a surprise attack. Looking at Ninjatown from a top down perspective, players use the Nintendo DS stylus to place a variety of Ninjas, each with their own fierce yet adorable abilities, around maps in order to defeat the Wee Devil army that Mr. Demon controls. The single player story mode includes over thirty-five maps across nine districts and is fueled by an epic tale about tasty ninja cookies.