ECHO

Every move comes back. Drag a ball and it slides one square — then, every three
turns, every ball you have moved repeats its move. Forever. Balls smash gems of
their own colour, so you are never just solving a puzzle: you are building a
machine out of your own past, and then watching it work. Line several balls up
to strike on the same beat and the whole board goes off at once. 160 levels,
every one of them verified solvable before it shipped, plus a Daily Echo that
changes at midnight.

Drag a ball to move it one square. Every 3 turns, EVERY ball you moved repeats
its move — the brass dial at the top counts down to the next beat. Balls break
gems of their own colour. Break them all before your moves run out.
Press WAIT to skip a turn and let your machine do the work. ERASE removes one
echo if you change your mind.
Desktop: drag with the mouse, or tap a ball and use the arrow keys; SPACE waits.