I like the concept of this game, withholding information from the player through a skill check. The joke was intriguing enough to keep me motivated to the end and yeah the punchline was pretty good, I laughed.
The only frustrating aspect is that if you get the stars quickly in succession, large chunks of the joke are skipped through. As you have to keep restarting and gradually uncovering more, you generally will hear all of the joke in different runs except in my case, I skipped over several sections toward the end. I got the gist and of course it makes sure the punchline comes through, still it would be nice if you could view the whole joke in sequence once you beat the game.