Welcome to the forum @Kopi! This is a friendly place where you can ask help on levels, report bugs, or just chat with other coders! Don’t forget to read the guidelines if you haven’t yet. Have a great time!
As for the volcano world, it is not released yet, and it will take much time, like in a few years, so the last campaign is Kelvintaph Glacier at the moment. The CodeCombat team is working on more levels in glacier before they move onto the volcano world