I had no idea, Nik! Welcome to the jam and I’m glad The Lost Stage of Roseville should you what else Omotenashi’s system can do (it really is a GREAT game). I’ll need to add Midnight Kopitiam to my list of games to check out.
Your idea is right within the spirit of Medusalaire - Shrek really did try to keep others out of his Swamp and I think in the first 3 films that a big part of his motivation. Wanting to go home and be home. I am very interested to see how this plays out for you. I think you can have a lot of fun with the idea.