Lumen — Circuit Studies

A luminous circuit puzzle set against deep forest greens. Rotate tiles on a 5 × 5 board to connect gold-lined nodes to a brilliant central source, tracing a growing network of lime-green light.

Click to rotate, or Shift-click to turn the other way. A nodes-online counter, rotation tally, and timer track your progress, while Restart and Reveal a turn controls sit beneath the board.

Fine borders, restrained typography, and softly glowing connections give Lumen — Circuit Studies the feel of a carefully crafted instrument panel. The displayed circuit is the first of eight, marked “Gentle.”