I’ve seen website-based examples (similar to CandyBox2, back when that existed), but not a standalone game.

I don’t think it’s a bad thing, though. It’s not like it’s required, and gamification may help the average user’s knowledge.

I’m currently using Win10 IOT LTSC on my main gaming rig, and Mint on my laptop to get used to the environment (started 2 years ago). It’s a great way to both get used to the new ecosystem, and have a fallback cushion if some software or scenario doesn’t work properly.