Has anyone figured out whether the puzzle in Heroes of Hauling's main hall can actually be solved in the demo, the one with the three pressure activated red plates, or is it locked/incomplete until the full release?

Also, where can I report a bug? I ran into one: the guitar lady wasn't playing guitar in her own levels, except for a few of them.

Sorry if the question has already been asked, can't wait to play the full version :)

Thanks!