Level 1-1 (Mario vs. Donkey Kong: Tipping Stars)
From the Super Mario Wiki
Level 1-1 is the first course in Rolling Hills and the first course overall of Mario vs. Donkey Kong: Tipping Stars. It also introduces the Red Girders, a primary gameplay element which is used to connect two adjacent rivets, creating bridges for Mini Mario and co.
Both Mini Marios begin on a platform right above the Goal Door. In order to reach it, they have to go around a line of platforms, traversing a pit of spikes twice at different levels. A steep slant will ultimately lead the toys right into the exit.
The M Coin is located at the same height as the starting point, on a knoll at the right side of the stage. To collect it, the Mini Marios should simply be led there using a series of Red Girder bridges.
Nintendo 3DS version
Wii U version