This is level 10 of the U-Tunnel.
In this level, the Student is excellent since she can control how far she can jump. This can be pretty useful in this level, because the difference of different gaps are large.
Child is great in this level, since he can walk on the crumbling tiles without toppling them. This can let the Child has additional platforms for him to stand on.
As for the Duplicator, his duplicates can significantly increase the survival rate of the Duplicator, making him easier to beat this level.
There is a cutscene that featured in this level. More can be seen over here.
After beating U-10, another cutscene starring the Duplicator and the Runner will begin. The Duplicator whispers to the Runner asking where she put the Planet, and that he promises not to tell anyone. The Runner looks exasperated as she explains once again that she didn't steal it. She then leaves to map out another tunnel and tells the Duplicator to "Catch up once you realize that the Planet orbits faster than us."