Been meaning to make a video of this for a while, but only just now got around to it. This shows off the main map as well as the optional / secret stuff.

This level is located in the medium lobby of the Anarchy Collab. Check out the collab here: https://gamebanana.com/mods/413521

0:00 - Map entrance + card
0:07 - Main level
3:16 - Bonus stuff