Four phases: build an automatic response, then find the real signal through visual clutter, then resolve a conflicting tone, then react again at full speed. Sound and vibration are part of it — turn your volume on.
01Green target → tap LEFT. Red target → tap RIGHT.
02Later phases add clutter, tones, and vibration. React to the color, not the noise.
03The mapping can change without warning. Stay reactive, not on autopilot.