I hear you. The nice thing about a simulation is that people can at least get a sense of the structure/rules without the potential distraction of it being contentious/emotional stuff.
Ultimately, including emotional dimensions of real work are critical for really understanding Holacracy, but there is something to be said for people playing abstract roles. Since, getting into, and sensing tensions from a role, is THE essential practice.
Regardless, I certainly don't have anything like that yet, but I'll continue working on the whole game idea from my role.