Not to be confused with “The Underground” above, Underground is the last of our biome-themed levels for this roster anyway. It is based on the second level theme ever seen in Super Mario Bros., being set underground in a cave crawling with Buzzy Beetles and Piranha Plants.
This stage will be a standard underground stage, possibly similar to the underground version of Mushroomy Kingdom. It will feature a line of blocks across the top that can be broken with just a hit and platforms moving up and down on conveyor belts.
Potential theme: https://www.youtube.com/watch?v=c0SuIMUoShI
