There is a little traffic with the crates sometimes...

Staged worlds are "locked" when you play them due to how the creator of the world set-up permissions.
Nonetheless, you can always make a local copy of the world, in which you'll have all permissions. To do this, open the pause menu while playing the world you want to copy, and click the icon with the two "world" icons overlaping each others.

As for the documentation, the sketch for this world was made in an overnight rush, it's probably very messy and with no comments, so it probably won't be of much help; but you can always join the discord, there's plenty of people helping others out there!

pity its doesn't allow viewing and editing - especially given the lack of documentation for components....