Regarding the afterlife world we see in the Angel Beats! anime, I have many questions, but I think we can pack all of them as "what are the specs of the afterlife world?":
- Are habitants limited to the school grounds? Can they, say, go somewhere really far away?
- Is this world based on an actual place in the living world? For instance, does this school actually exist somewhere?
- Do all individuals that die with regrets end up here? Surely millions of people die this way, and I'm pretty sure that we never see more than a few thousands.
- Are there other afterlife worlds? Or everyone ends up in the same place?