World 9-6 (Super Mario Maker for Nintendo 3DS)
From the Super Mario Wiki
World 9-6 is the sixth level of World 9 of Super Mario Challenge from Super Mario Maker for Nintendo 3DS. The level involves Bill Blasters shooting out both Buzzy and Spiny Shells. There are a few Super Mushrooms and 1-Up Mushrooms throughout the level to help the player. Near the end are Donut Blocks that will take the player below the area they have already been.