Echo is played in the dark: every sound wave lights up the walls around you for a moment. A small number of people can
have seizures triggered by light patterns, even with no history of epilepsy.
If you feel dizzy, notice altered vision, twitching or confusion while playing, stop right away and see a doctor.
REDUCE FLASHING
SCREEN SHAKE
Reduce flashing makes walls light up and fade more slowly and dimly, and replaces full-screen flashes with a soft edge glow. Change it any time in SETTINGS.