Overall, the build features a relatively simple marble run. It consists of just six 3D printed ramps which the marble tumbles down in just a few seconds.

Unleash the excitement of an insane multi-level marble run, complete with a giant elevator that adds a jaw-dropping twist to the race. Watch as marbles ascend through multiple levels, navigating ...

And to get a sense of its popularity, that initial marble run (which was not mechanically looped) has already garnered close to 1.2 million views. Marble Run Alternator Test.