{
  "title": "Moonminute \u00b7 The Sandkeeper\u2019s Bells",
  "slug": "moonminute-sandkeeper-bells",
  "tags": [
    "github-source",
    "game"
  ],
  "original_code_license": "MIT",
  "provenance": "Original idealized reversible-hourglass event-time puzzle. No upstream code, scientific model, data or assets reused.",
  "github_reference": {
    "url": "https://github.com/iterami/Countdown.htm",
    "role": "research reference only; unlimited add-time game rejected as too trivial/generic for direct selection",
    "observed_stars": 1,
    "license": "CC0-1.0",
    "maintained": "2026-09-11",
    "observed_date": "2026-11-13"
  },
  "inspiration": {
    "url": "https://link.springer.com/article/10.1007/s44461-026-00021-y",
    "title": "Vibration-assisted granular flow under simulated lunar conditions",
    "published": "2026-11-09",
    "role": "Thematic lunar sand/glass inspiration only, not model or gameplay source"
  },
  "generated_assets": [
    "observatory.webp",
    "sand.webp"
  ],
  "generation": "Two built-in GPT Image generations optimized locally; sand fills actual changing chambers",
  "rules": "Flip complements remaining time; advance skips min positive remaining; exact ordered bell timestamps; no real-time countdown, granular or gravity simulation"
}