ECHO - Signal Puzzle

Reflect. Split. Connect. ECHO is a minimalist logic puzzle about routing a signal. Place mirrors, angle them, and send the beam. It either reaches every receiver, or it shows you exactly where it went wrong. No timers. No lives. No punishment. Just a board, a beam, and the quiet satisfaction of a route that finally clicks. ROUTE THE SIGNAL Tap an empty cell to place a mirror. Tap it again to rotate it. Press SEND and watch the beam travel, bounce and light up the receivers. Wrong route? Adjust and send again - nothing is lost. THREE STARS, ONE OPTIMAL ROUTE Finishing a level is easy. Finishing it in the fewest possible moves is the real game. Every level has a verified optimal solution, so three stars is always possible - and always earned. MECHANICS THAT BUILD ON EACH OTHER - Mirrors reflect the beam ninety degrees - Blockers absorb it completely - Splitters divide one beam into two - Portals move the beam while keeping its direction - One-way gates pass only a beam travelling their way - Multi-hit receivers need charging from two directions - Multiple emitters: two signals, one board Each one is introduced on a board where it is the only thing you have to understand, then combined with everything before it. 36 HANDCRAFTED LEVELS Three chapters, each teaching a new way to think about the beam. Every board is designed and verified - never randomly generated, never impossible. DAILY ECHO One special puzzle every day, the same board for everyone. Build a streak. BUILT FOR SHORT SESSIONS A level takes under a minute. The game remembers everything, works completely offline, and never asks you to sign in. DESIGNED, NOT DECORATED Dark background. One cyan line. Soft glow. No clutter, no pop-ups begging for attention, no fake urgency. Just a puzzle that respects your time and your screen. Free to play, with an optional purchase to remove ads.