Echo Cartographer

Echo Cartographer is an echolocation maze game. Fire sonar pulses to reveal the walls around you, watch them fade back into darkness, and keep the map alive in your memory. Harvest echo crystals, memorize the voids, and reach the green exit before time runs out.

Every frame below exists because a sonar pulse just passed through it. Nothing stays lit — visibility is a resource, not a default.

The caves are pitch black. Emit sonar pulses to reveal the walls around you — then watch them fade back into darkness. Nothing stays visible; the map lives in your head. Reach the green exit before your time runs out.

Tap anywhere to set a waypoint. Your probe glides toward it, sliding along unseen walls. Tap your probe or the PULSE button to ping — you carry 5 charges, regenerating slowly. Spend them like they're the last light in the world. They are.

Faceted crystals hide in the dark, glowing cyan when a pulse finds them. Collect one to refill all 5 sonar charges instantly. Detouring for a crystal is often the difference between a mapped cave and a lost probe.

Swirling voids devour anything that touches them. A pulse reveals their burning spiral for a few seconds — memorize where they lurk. The most dangerous thing in the cave is the hazard you saw once and forgot.