From the developer:
Roto is a challenging and addictive game developed by international best seller Dr. Reiner Knizia.
The rules are simple so anyone can play:
You rotate 6-colored wheels to match segments with the same color in adjacent wheels, without losing points on needless rotations.
Mastering all the challenges and planning ahead to use the best possible combinations is harder than it may seem.
There are 3 different gameplay, all with different constraints: