Cirrusfold · Clear-Sky Passage
An original atmospheric altitude-planning game inspired by recent contrail-avoidance trials. Drag seven waypoints through a painted Atlantic sky, respect climb limits, balance wind and climb fuel, and avoid ice-rich pockets under a persistent-trail allowance. Eight handcrafted crossings, animated test flights and visible contrails, pause/return to plan, undo, exact one-waypoint hints and a local logbook. Three original GPT-generated local WebP assets: aircraft, cirrus ribbon and blue-hour sky. Original JavaScript game MIT. GitHub scientific concept reference only: https://github.com/contrailcirrus/pycontrails (114 observed stars November 9, 2026; Apache-2.0; pushed November 7; commit f47646144218dfe9e5b32836de9ad853705a5239). No upstream code, models, weather, aircraft data or artwork reused. Popular game candidates failed duplicate, backend or licensing checks. Metadata tags: github-source, game. All game assets local; no model, account, server or database needed.
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