I don't understand the rules well, but the first level must start with an ice planet unconditionally?

Hi!. Of course, any planet as long as it's in the Any%, Any% Cathy and Coop. 100% category has specific rules, so be careful with that. You are kindly requested to read the rules carefully and if you have any questions please let us know by this means, have a good day and good luck in future races :D