Why are there Game like Questions?

Game like questions could be in this movie, which is about existence in order for Rosencrantz and Guildenstern to figure out why they are actually in existence. They do nothing in this movie of true importance so far. They ride horses, flip coins, and are clumsy. Maybe they are questioning what their real purpose in life really is. The game they played doesn't seem like they could find out anything about each other. They can't answer any questions but just keep asking them. Also in the movie, they are called by both names, making it not only confusing for them to know who they are, but for the audience.