Instructions:

1. Warm-up: Begin seated, gaze centered; press Start.

2. Work interval: Follow and click/tap for 30 s (or less if symptoms spike).

3. Rest: Look away, blink, do three diaphragmatic breaths until symptoms ≤ baseline.

4. Repeat for up to 5 cycles per session, 1–2 sessions per day.

5. When you can finish all cycles at Level 3 with minimal headache (< 3/10) for a full week, increase either:

   • Session length (e.g., 45 s work / 60 s rest), or

   • Code-level constants: increase starting speed or speed increments at each level (ask your doctor to make this change for you)

Note:

• Every 5 hits the game increases one Level and the ball’s velocity rises