The course features eight minis, the most in any course in the game along with Room B-8. It is one of the three courses (aside from Room R-10 and Room R-12) that need to be completed in order to unlock the option to change most levels in the game so that they feature a mix of all types of mini toys.
All minis start in a long row on the left side of the course. The Goal Door is located on a ledge in the bottom right, with a series of Blue Springs placed on a long bed of spikes leading to it. The minis are required to descend to the bottom level and bounce from one Blue Spring to another to reach the Goal Door.
Mini Mario Card
The Mini Mario Card is located on a short platform in the top right area of the course. The player must first use Pink Blocks to guide the minis to a Yellow Spring in the top left area, which will bounce them to the top of the course. There, they will soon encounter and press a Red Color Switch, which activates a red bridge that leads to the Mini Mario Card. The player should then arrange some Pink Blocks to lead them to the bridge and help them collect the card.