Your real commit calendar, played as a board. Arrows / WASD to steer, Space to pause, R to restart — or hand it to the autopilot, which plans with BFS and refuses moves that would seal it into a dead end.
Theme and play mode are in the URL too, so a link can carry them:
?theme=matrix&mode=play&speed=6. Same tick logic runs headless under
node --test in tests/core.test.mjs.