Puzzle
One arrow. The whole board answers.
Aim one arrow. Watch the board answer. Short sessions, no account, progress on-device.
A quiet arrow puzzle. Progress stays on your phone. Free, with ads off the play canvas.
What Echo does
One move, many echoes
Each shot ricochets the puzzle state. Solve by thinking two bounces ahead.
Quiet by default
Built for a few minutes on the train, not a live-ops treadmill.
Yours on the phone
Progress lives in local storage. Ads stay off the play canvas.
How it works
- 01
Read the board
Arrows, walls, and targets. That is the whole language.
- 02
Fire
One shot. The rest of the grid reacts.
- 03
Clear the pack
Finish the set. Come back later — nothing is waiting in the cloud.