Tell me about public blockchain apps that do not involve objective money or objective identity, which require strict global consensus, why they should be built on public blockchains, and why haven't they been built yet? I'll consider writing a post, when I get back to it, to explain why it does or doesn't make sense

metaverse world rules/logic (snow crash inspired). Can’t have hidden rules in a metaverse that can benefit subsets with access to cheat codes, especially as it becomes more enveloping

All game logic should be public.