Navigate blind through invisible obstacles. Sonar pulses reveal them — but only for a moment.
📡 Hold to rise · release to fallYou can't see what's coming. Every 1–2 seconds your position sends a sonar ping — an expanding ring that briefly lights up any obstacle it sweeps over. Watch the echoes, memorize what you saw, and maneuver around it before the darkness returns.
Fly through a pitch-black field of invisible obstacles. You can't see them — but every second or two your craft sends out a sonar ping. When the expanding ring sweeps over a block, it lights up in neon for less than a second. That's your only warning. Free to play in any browser, no download, works on mobile and desktop.
Hold the screen (or hold Space) to rise against gravity. Release to fall. Sonar pulses fire automatically — watch the cyan ring expand outward from your position. When it hits an obstacle, that block briefly glows orange and pink. Use that flash to judge where it is and whether you need to adjust height to pass above or below it.
Stay near the vertical center to give yourself maximum room to react up or down. As speed increases, the time between echo and obstacle arrival shrinks — at high scores you'll be reacting almost on instinct. The edge vignette turns red-pink when a dark obstacle is close — treat it as a proximity alarm.
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