This might have been jumping the gun when skimming the changes I made. I did link up the scenes, but it was pending a look-over by Leek before being ungated. Leek did get to finish the review and unlocked the content, so you should see it actually appear in the next release (hopefully soon).
As far as there not being a Back button, I think this is intentional as there doesn't seem to be any scenes written for backing out. So once you use the machine (for both Luca and Badger variants), you're already committed to making a choice from the menu--and if there's only one available option, it will use that option automatically.