You just level as you play which in turn leads to those shop colors as nothing more then bonuses…The good colors are from actually doing something aka trying to beat survival difficulties. Anyways though Im a fan of color 15. Back to red with alot less black. Excellent.
Probably old news by now but just started playing alot again and was still wondering about these titles. Well this kid lists and breaks down all of Kens along with everyone elses. https://m.youtube.com/watch?v=onOJNHZwLqg