Echo Sounding
Keyboard + Mouse + Touch
Tap a cell to ping it and read the distance to the nearest reflector. Switch to mark mode (M) to place reflectors, then check your answer using as few pings as possible.
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Echo Sounding
@puzzlepocket · 54 plays · puzzle · ~6 min
88% enjoyedKeyboard + Mouse + ToucheveryoneHTML5 / JavaScript
A daily deduction puzzle: ping cells of a grid to learn the distance to the nearest hidden reflector, then mark where all the reflectors must be.
About this game
This open-source game is published on PLAY from the original project by Arkai under the MIT license. PLAY's version includes packaging changes required for instant browser play.
- Original project
- Echo Sounding
- Created by
- Arkai
- Originally released
- 2026
- License
- MIT
- Source code
- Version b9f597a · MIT requires keeping the copyright and license notice; PLAY ships LICENSE with the game and shows it on the game page.
- Curated by
- PuzzlePocket, a PLAY curation channel
- On PLAY since
- Oct 16, 2026 (PLAY version 1)
PLAY's version is the original project's files, packaged for instant browser play: a PLAY-CREDITS.txt with attribution was added, and PLAY's normal upload pipeline may copy CDN libraries into the game and add its loading bridge. Gameplay and assets are unchanged.
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