I often ask myself "how much game is enough game?", and I often come up with the same answer. In fact I don't think it's limited to games, but if you're trying to tell a story or deliver an experience, it needs to be as long as it needs to be. Can you make the point within an hour, or over a couple of pages? Maybe you need a rolling epic to clearly provide the perspective needed to appreciate a fable. Either way, I often find myself thinking that a game might have overstayed its welcome in one way or another.
