Hmmh, I see.. It's a little glitch.
When you press "UP" (or joystick up) to leave the moon, you're teleported at the funfair. But if you continue to press up, your're teleported to the moon again... :-(
Try to press "up" juste once, normally it should work.
Sorry for this glitch ang thank you for playing Naufrage and for your encouragement :-)