Klumen

Klumen is a grid of dim wiring with a single star glowing at its centre. Every piece on the board is a fragment left facing the wrong way, and light cannot travel through a join that does not line up.

Tapping a piece rotates it a quarter-turn. That is the entire input. The challenge is seeing which neighbour a piece is reaching for, and noticing that one correction near the middle usually unsettles three pieces further out.

A level ends once the glow has spread through the whole weave, and you are asked to get there in as few turns as you can. Nothing is timed and nothing runs out, so a board you cannot read yet will simply wait.

Two helpers sit below the board, Reveal and Hint, with three of each to begin with. Stars gathered along the way feed a shop and a customise screen, while a ranking board keeps the count. The guide stays one tap away from the menu.