Just rotate and wait....
It's a boring game, if you have insomnia, try it, maybe you will get sleepy soon...
Rotating the ring makes the white dots are line up in a straight line.
In addition to this, You can find the fastest way to next level, just like the strategist;
And, You can also move and relax the white dots as you like, letting them run according to inertia and wait for coincidences to occur;
Hope you can find your own fun in the game!