Why has there suddenly been a rash of games that provide metacommentary on the conventions of the videogame? Upgrade Complete and Achievement Unlocked, Ginormo Sword, and now You Only Live Once. It may sound like a Bond title, but take it literally.
You Only Live Once is a sardonic commentary on the meaning of "Continue?" in the context of a videogame.
But it's moderately amusing and won't take you five minutes.
You will not be able to replay it, however (at least, not without mucking about with Flash's local storage scheme). Because, of course, you only live once.