Excellent article on level design in games to encourage player exploration, and considering the movement motivations: https://gamasutra.com/blogs/AndrewYoder/20190808/348237/The_Door_Problem_of_Combat_Design.php
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Exploring design ideas using AI as a learning assistant, for creative exploration: https://andymatuschak.org/hmwl/
It's odd that games often show the hours played, but I've not seen this in other apps.
"You've spent 20 hours talking to this person." Would this be a usage deterrent? If so, why do many games offer it by default?
The Matter protocol is excellent for puns.
"Does it Matter? It doesn't Matter."