ECHO

The ghosts are invisible. The pellets are your only sensor.

Eat a pellet and it prints how many ghosts were within 4 tiles — at that instant. Its colour shows how close the nearest of them was: green is far, red is on top of you. The reading never updates. It goes stale, and it fades as it ages.

Ghosts patrol fixed loops, so old readings can still be extrapolated forward. Learn the routes.

Power pellets (the big ones) reveal every ghost for a short while. They do not make ghosts edible.

One touch kills. A red pulse warns you when something unseen is close.

Hover a number — or press R — to mark out the exact 9×9 area that reading covers.

MOVEArrow keys / WASD — or swipe on touch. M mutes.

EASYOne keypress = one turn; the ghosts step only when you do, and readings age in turns, so thinking is free. Space waits a turn.

HARDReal time. Readings age in seconds and the ghosts speed up every level.

READINGNumber = how many ghosts were in range. Colour = how close the nearest one was. Brightness = how much you should trust it.

RANGEHover any number to outline the 9×9 area it was listening to. R pins it: nearest reading → all readings → off.

nothing in range 4 tiles 3 2 1 on top of you stale