I checked it out, didn't seem anything special.

Tried to climb the highest hexagonal level, but it seemed impossible. Raced across the second-highest but no mountains were reaching high enough.

Finally I let myself fall. Realized the underside of the hexagonal level was sticky and kept me flying attached to it for a while. With a little twist I could even lift myself up to the surface.

Found a high mountain, jumped to the underside of the highest hexagonal level, and voila. I was stuck and able to get to its surface.

Then I just glided at high speed on top of the world. Nice.