It may not be the most important thing to add but i did have a little random thought to add some more gameplay/return incentives for customers :)
What if theres a little stall inside the building with a bunch of Japanese snacks (think the kind of stuff you can buy in bulk like different candies or pocky etc) and the customers could play a little minigame (Something simple obviously!!) and ''win'' a random pack of snacks!
They could be like ''collectibles'' to incentivise people coming back to collect them all?
(Though this idea could work with something like a gachapon machine and collectible figures!! but since its a food game i guess the snacks work better!)
Sorry if this has already been suggested before !