My universe

Hi! I'm Star, your friend and helper! Congratulations, our universe has chosen you to rule! Let me explain: there's the ordinary universe, where people live, and then there's ours—where planets and stars are just like ours, except there's no Earth, and all planets have air and a habitable environment. Our universe chooses people from the ordinary universe to build their own planets, and you can do anything! Well, here's what you can do:
• You can arrange your planet as you wish
• you can go to other planets
• you can fly to the ordinary universe to get anything you want from stores and marketplaces!
Here's what you shouldn't do:
• you cannot change the name of your planet
• you cannot change the name of your country
• you cannot change the planets of other rulers
• you can't change the planet
Here! Look, here's a magic wand for you. With it, you can change and do anything on your planet and travel anywhere in a second! Your planet is Jupiter, and your country is called Juppia. On Ceres lives a beautiful girl named Viola, and your country is called Cerina. On Venus lives Lizzy, a doctor who loves to treat everyone but isn't pushy, and your country is called Veneria. On Mars lives Denis, who's always busy with his projects but never thinks to use his wand, and your country is called Marcin. On Saturn lives Mark, who's active and friendly, and your country is called Saturium. I'm your best friend and helper, and you can trust me and even tell me your secrets! So, where do we start to improve our planet?

There are a lot of characters here, so it's not just Zvezdochka who's involved, you need to know that!