Easy: Basic triads, sus chords, basic 7ths, 6th chords, add chords.

Medium: Adds 9ths, 11ths, 13ths, suspended dominants.

Hard: Adds altered dominants, diminished, minMaj7, accidentals.

Competition: Same as Hard but with a 15s timer.

Shell Mode: Reduces chords to Root, 3rd, 7th, and essential extensions.