reversi, played as a sequencer

Standard Reversi/Othello (outflank a line of your opponent's discs to flip them, a turn is skipped automatically if you have no legal move) with a twist: every move sweeps a bar once across the eight columns, left to right, and sings whatever's sitting on each column as it passes. Any disc just placed or just flipped rings out with a bright shimmer on top of its note, so a big flip becomes a little cascade of sound, not just a silent color change. Row picks the pitch, color picks the register, and the skin you choose is the instrument.