From the Super Mario Wiki
Muncher Mayhem is Soundfrog's first official course in Super Mario Maker, released on November 5, 2015. It is set in the ground theme for its main area and in the underground theme for its sub area, as well as in the Super Mario Bros. 3 game style.
The level begins with a drop, which leads Mario directly to a Shoe Goomba. Mario must then head past some Colossal Koopa Paratroopas and stick to the top of the area to hit a P Switch, then head right. Mario has the option to enter a warp pipe to collect more coins before the effects of the P Switch wear off. Afterwards, Mario must head down and to the right to reach the goal.