Unlock Extra Courses in The Rhythm of Fighters

You get the first four courses free but after that you unlock them by clearing the previous stage.

Course 5:
Clear ALL of Course 4

Course 6:
Clear ALL of Course 5

Course 7:
Clear ALL of Course 6

Course 8:
Clear ALL of Course 7

Course 9:
Clear ALL of Course 8

Course 10:
Clear ALL of Course 9