You can also add one for the small obstacle course in level 1.

There should be one for all the sub levels. It would work like you have to get the cosmetic in sub level the fastest.

Why is the video unavailable?

You would start in level 17 and beat it then press the button to go to level 16 and beat that and just keep going tell you beat level 1

Another idea is that you beat big scary backwards

Crazy run dude

I was thinking the same thing to get the world record. Death warps