from having built a bunch of tiny indie games in a prior life (in Flash :P), time = state, and time = world and depending on what games we're building, either

from having built a bunch of tiny indie games in a prior life (in Flash :P), time = state, and time = world and depending on what games we're building, either we record actions as state changes (eg chess / turn based games: if no moves are made, time didn't elapse), or "real-time" games (eg chess w/ a world state like a clock)