Neurotic writers manipulating their self-aware fictional characters isn’t a new device, but unlike similar stories, The Bard’s Town’s funny and engaging “Chasing Ophelia” isn’t concerned with picking the navel of the writer’s creative processes or artistic tensions. For a romantic comedy, this play’s concerns are remarkably, well, theological: is an unseen, omniscient being really in charge of us, and how do we deal with feeling abandoned by him?