Mars is a place where alien platypi live. Jupiter could be accessed by the red planet icon in the bottom-right corner of the screen but you need to unlock the first world platypus, Qwock . The poop coins is not used in jupiter, but rubies are. You can use these rubies to purchase platypi on earth. Just like on earth, the alien platypi poop coins and rubies. And, they will poop every second! You can gain rubies giving similar platypi to an alien. The alien appears when the biggest alien is created, Platargeddon, and asks you to sell it for 30 diamonds.