It's just a single page, yes! Due to the space constraints, I couldn't fit a more detailed and structured explanation of what the game is "meant" to look like. But I think that in a self-propelled experience, non-explicitness is good - at the end of the day, it's the player who determines what their experience with the game is. It asks the player to be a "game master" as well, if you like. It's okay if that's not for you!