Form: Intro → A theme (french horn over a marimba 16th ostinato and slap-bass riff) → fill → B section (G-major lift, flute lead, HALF-TIME feel) → clap-roll fill → A′ (theme re-orchestrated: xylophone + brass in octaves, congas, new bass syncopation, phrase 3 lifted a 4th) → 8-bar percussion-only break (taiko / conga / clap trades) → coda → loops to A. Click the timeline to jump. Layers: the momentum slider adds stems at the barline — motion brings the tune, drive adds strings + shaker, sprint adds taiko doubles, brass stabs and tambourine; impacts duck the score. All voices are the platform's sampled instruments; wind and distant street-crowd beds run underneath. Press Space to start.