In this level, an Alien in a lab coat says:

"Activate the red wall circuitry on either side of the walkway behind me or face immediate probing, puny meatslave!"

What am I supposed to do?

you know those red squares behind the alien, if you grind the green rail below you towards one of the red squares and sticker slap it, it will turn green. if you make both of them Green the spaceship that's in front of you when you start the level will fly into a portal then your supposed to go into the portal. the portal will take you to an Aztec place then you tag these 5 idols and then you go to hell through another portal:)