Play 2D

The 2D mode shows notes as a falling note highway: ten lanes (one per harmonica hole), each note a colored ribbon as long as the note lasts, scrolling down toward a fixed hit line. The bright cap at a ribbon’s bottom is the attack, and holds the note’s tab (-4, -3'' for a bend).

• Notes are colored by breath direction — blow and draw each get their own color, shown in the legend beside the highway.
• A note turns gold while you hold it, and red if it’s missed. Techniques are drawn along the ribbon — see Playing a Song.
• The hole strip along the bottom mirrors your harmonica, live — useful for double-checking which hole/direction a note actually wants without reading the lane position.
• Optional hole-number labels (Options → Note labels) replace the plain up/down arrow in each note’s cap with its actual hole number, if you’d rather read “4” than work out the arrow from the lane.
• The metronome, technique legend, and score/combo sit in the HUD to the side of the highway. Authored phrase and chord labels appear in the phrase banner; gameplay does not invent a blues progression for a chart that does not contain one.
• A tab-notation ribbon shows the current musical phrase’s notes as plain text (e.g. -4' +5 -4) as they come up — handy if you’re more comfortable reading harmonica tab than the highway.

Everything else — scoring, pausing, looping, adaptive difficulty — works identically to Play 3D; see Playing a Song for the shared details.