Play Modes

Regular
Your regular play mode, normally with 3 to 5 stages.

Nonstop
Course mode. Pick a course to play a series of songs in order. It reads from .crs files in the Courses folder, but also has auto generated ones from your song groups.

Oni
The same as Course mode, but the lifebar type is set to Battery with 4 lives.

Endless
Play songs until you fail.

Battle
2 player battle mode. No idea how it works.

Rave
The same as battle, but with random modifiers.