itch.io has regular browser games here: https://itch.io/games/platform-web

itch.io also has PICO-8 games that can be played in the browser here: https://itch.io/games/tag-pico-8

Many of the top PICO-8 games are de-makes of popular titles, so that might help. Here’s a list for de-makes: https://github.com/pixelbath/pico8demakes.

Celeste seems like your best option, but there are a handful of games with the “Narrative” tag here: https://itch.io/games/tag-narrative/tag-pico-8

The registers with cashiers also have scales and cameras and systems that are built in to determine when a CSM is required for things like overrides. The tech is not appreciably different. It's not automation.

This isn't automation though. The self checkout tech is the same tech that a cashier uses. It's not automated. A human still does the work, they just don't get paid for it.