Echoes

Echoes is played on a five by five grid with four green chips, one yellow chip and a red target dot. You never move the yellow chip yourself. Tapping a green chip lights up the squares it can slide to, and tapping one sends it sliding in a straight line until another chip or the wall stops it.

Every time you move, the yellow chip echoes you: it slides in the same direction until a chip or a wall stops it. The puzzle is to set the green chips up as blockers and pick your directions so the yellow chip comes to rest on the red dot.

Each board has a par, and the result screen says how many moves you took against it (today's board, #42, has a par of 4). It also shows a slide profile with a coloured square per move for how far the yellow chip slid, and the final board, all of which you can copy to share. A perfect echo needs every move to carry the yellow chip some distance. You can undo and redo, turn on a marker that shows where the yellow chip will land, and switch to yesterday's board, the only past day it keeps.

Echoes is made by Timothy W, runs in the browser on a phone or a computer with no account, and refreshes at midnight Eastern Time. It suits players who like short move-count puzzles in the style of Ricochet Robots.