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Ya, you can change it at any level, as long as you have it unlocked
ya, the level is just what you unlock it at, but you can change to any previous colors unlocked
The suggestion is mainly for the idea of having colors, i just put a example of some possible ones. Someone else can decide what colors they...
From my understanding, people have made many suggestions in the past, for some type of level reward. But, they were made to be strictly cosmetic...