性能改善
It is a one-line puzzle game that is easy to play and becomes a habit.
Connect all the rings with a single stroke. Challenge to clear all stages! !!
The rules are very simple.
It will be clear if you connect the dots and add color, and connect all the dots.
![Absolute pitch [Voice scale confirmation app]](https://play-lh.googleusercontent.com/aL3lyd5JGLAU_Cd9kiYqO9IcCWktrLIWa5U-5ZJHqmAWKuERihj2N46nx-c2EiS7-w)
