So, after turning over the goods to the couple, the game locks me in their room.  I can knock on the door to redo the turn in (except I don't have the goods anymore and I get the fail state), but I can't do anything else.

I'm sorry that this happened, we will investigate how to fix it but I imagine it will take a few months until we can patch it on the public demo. Does it work if you deliver the goods and while you are locked inside of their room, you saving the game and reloading?

Turning it in again after being locked in the room let me out.  But reloading the save got the same situation.  It might have something to do with loading a save from before the turn in was possible?