**Project Impurity** ranks and evaluates levels from New Super Mario Bros. Wii, examining their design, difficulty, and overall quality. This comprehensive collection spans iconic stages from World 4-4's underwater fortress to the treacherous World 8-7, including challenging tower and castle levels that test players' platforming skills.
From the desert fortresses of World 2 to the sky-high challenges of World 7, each screenshot represents a unique Mario adventure filled with enemies, obstacles, and secrets. Whether you're analyzing the precision-platforming of World 6-A or the intense gauntlet of World 8-1, this ranking explores what makes each level memorable—or forgettable. Perfect for Mario enthusiasts looking to debate which stages truly stand out in this beloved Wii classic.