A normal level.
Special thank： he2o3(for his great advice)
Not optimized for thumb. 不针对拇指优化.
If you play only with your thumb or your level is low, please play a easier chart to practice.
如果你使用拇指游玩, 这张谱不适合你. 如果你的水平较差, 请先玩简单的谱面练习基本功.
Update*2 : cut 3 notes,let it's level down to about 15.25. And better felling.