Shutterfern · Signal Conservatory

Rotate circular shutter masks through a sequential signal instrument. Incoming signals rotate then XOR with each mask; match intermediate checkpoints and the final receiver across eight authored boards, including fixed shutters. Exact-search hints, keyboard/touch, undo/redo, reset and local saves. MIT adaptation of https://github.com/misakamikotoghr-5205/lumen-shift with GPT Image brass/fern lamp assets integrated into live signal cells. Metadata tags: github-source, game.