Ruby's Slippery Slopes
From the Super Mario Wiki
Ruby's Slippery Slopes is an official course in Course World in Super Mario Maker 2. It is a level published by NintendoUS, and was created to celebrate the 2019 ARDY event. It is set in the ground theme and in the underground theme for its sub-area, as well as in the Super Mario 3D World style.
The level begins with a ? Block containing a Super Bell, followed by a ? Block containing a Skipsqueak. After a slope with Goombas, Mario must bounce on Mushroom Trampolines while avoiding Koopa Paratroopas, then cross some Warp Pipes with some Fire Piranha Plants. Some slopes follow (one of which leads to a 30-Coin behind some Crates), Mario must slide down a slope with more Skipsqueaks, then enter a blue Warp Pipe. After collecting a Super Star, Mario must plow through some winged Piranha Plants to pass an emblem of Mickey Mouse wearing headphones, followed by a slope leading to the Goal Pole.
"Created for the ARDYs: A Radio Disney Music Celebration"