Read it.
Play it.
Keep the rhythm.

Play each note when its centre reaches the pink line. Start with whole notes C4, E4 and G4. Every 8 hits adds speed and difficulty: more pitches, half notes, then quarter notes and accidentals.

Wrong pitches, early presses and missed notes cost one life. Three mistakes end your run. Every 10 consecutive hits earns 250 bonus points; every 20 restores one lost life, up to three. Mistakes reset the recharge meter. Timing starts at ±700 ms and tightens to ±110 ms. Tap the piano or use A–K for white keys, W E T Y U for black keys. MIDI uses the exact octave.

Judge the note’s arrival; holding the key for its written duration is not required in this first prototype.