This is basically slightly modified version of going up...with a simple catch. You'll see what I mean.

::MINOR SPOILERS::
This kind of explains the level, so if you don't really want to know what the catch is, then don't read ahead. Okay? Cool.

I put this as a sample level, as its a way to use thin geometry as an gimmick to the level. In this case, there's a thin gap between the ground and the ballbuster part. This is why when you drop an egg from a certain height, it'll "crack". That's really it.