This is level 50 of the Main Tunnel.
This level is made entirely of small platforms. You need to long jump constantly and remember that you can change walls. The best character for this is the Runner, as it is easy to know where you are going to land and she is very maneuverable.
Another strategy is using the Child, as he can jump on the crumbling tiles, and you can glide your way from platform to platform.
And notice how the shade of orange in the tiles is a lot darker. From now on, the colours are completely random. It could be any colour.