As you collect items and complete activities, they are changed. If you leave and return, it will be exactly as it was when you left.
Once you have built a new spaceship on Astro Knights Island, it will park on top of the castle whenever you leave the island.
To return to space on Astro Knights Island after completing the mission there, you can head back to the rocket ship in the observatory and select the option to launch it again. This will take you back to space where you can explore further or complete any remaining tasks.
When you are in the spaceship (solar system) view, click on the moon or planet you want to land on. To leave again, use the "launch" lever.
There is no way to reset an island. On Astro Knights, if you leave the island from space, the spaceship parks on top of the castle in Arturus. To replay the island, you would have to create a second username. You can have as many as you want, saved or unsaved.
You have to defeat the other two planets as well, the Jungle Planet (X-15 Y-15) and the Fire Planet (X-83 Y-20). When you have all three knights aboard your spaceship, you can go in search of the princess. (see related question)
Park your Spaceship on top of the CastleTo leave Astro Knights Island (without completing the quest), return to Arturus on the planet Poptropica (X-56 Y-52), landing there and not on the Pewter Moon. Your spaceship will park on top of the castle.Shortcut to another Island (to play another island or an ad-game)To "quickly" leave Astro Knights Island, you can use the Haunted House. While previously it was free and now may not open, new users can buy it from the Store for 350 credits. Select it from your Store Items list, enter, and then leave. You should be at the Island Map, from which all current islands can be selected. When you are ready to resume the Astro Knights quest, return to the island by blimp and enter Arturus. Your spaceship will be parked on top of the castle and you can return to space with the same status as you had previously acquired.
Whenever you leave space, your spaceship is parked on top of the castle in Arturus.
If you land on earth with your space ship, it will be on top of the castle waiting for you!
At the end of the island quest, you receive the Island Medallion. At that time, or if you return to the planet Poptropica for any reason, your spaceship is parked on top of the castle.
If you leave the island or log off while in space, or return to Arturus for any reason...Your spaceship parks on top of the castle.
next to the museum by the the knight
Any changes to the game, or items, will remain until you return to that island. Islands cannot be reset. When you return from another island, you start on Main Street as before. On Astro Knights Island, if you leave from space, your spaceship parks atop the castle.