World 7-7 is the seventh level of World 7 in New Super Mario Bros.. To reach this level, the player should take the secret exit in World 7-6. Game: Super Mario Bros. 3 Genre: Adventure System: Super Nintendo (Part of the Super Mario All Stars - Originally on NES) Developer: Nintendo World 7 - Level 9 World 7-7 is the seventh main level and the ninth level overall of Pipe Land in Super Mario Bros. 3.The level becomes accessible upon completing World 7-6 and its own completion unlocks World 7-9.. Layout [].