Have you a strong memory? Try...
- * World A:
the easiest! There is also an hint sign to help you. - * World B:
the middle one. No hint for you and the first box is already colored. - * World C:
hazard. No error allowed!
Too complicate? Switch COLORS / ICONS. Go in the settings (swipe left on the home) and change it!
Enjoy yourself and stay tuned, new levels are comings with the next versions.