[apatheticonion]

Could you recompile a ROM and embed it with a universal "emulator" game engine? (in the same way the OpenGoal project that recompiled Jak)

I guess that would be illegal because you'd then need to distribute the game code.

Perhaps a toolkit that allows users to compile the emulator+rom themselves?

But then I guess Apple doesn't let users run their own unsigned binaries so that's not possible :/