Here’s the first data of my playing stats… There are few play modes. There’s the “Story” mode and the “Quick Play” one. I first tried QuickPlay.
The song list is divided in several mode of difficulty:

Beginner
Apprentice
Moderate
Solid
Tricky
Challenging
Demanding

Hello Goodbye – 11,691 – 6th – 65524, edisinsane2, snoopy 4ever 11697
Getting better – 15516 – 6th – 54,963 – beingmused, [...]