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My best guess would be to use a utility like Utiny ripper, rip the assets, then load the project files into a(n appropriate) version of Unity (if you can't load it directly into live2d with a Unity format). May encounter some issues because some of the scripts may be absent since compiling, or something like that.
go to the credits screen, and spell out fool using the letters of the patrons. (ie. using the f from fl, the o from foo, the o from Foks, and the l from FoolGuy)
I am still waiting for new Hell charts. Could I scratch that itch by making my own charts in Stepmania or something? Probably. But it's just not as funny