Mossvault - A Lantern in the Unknown A dependency-free browser adaptation inspired by the Wumpus World Simulator. Source: https://github.com/thiagodnf/wumpus-world-simulator Verified reference commit acb0e3ff544c2b87fe797f5382bb9e81f0afe42b Observed: 52 GitHub stars; maintained August 28, 2026. Original interface, engine implementation, six authored maps and seeded expeditions for this adaptation. The classic sensory-neighbor rules and movement system were studied from the source. Changes: direct movement instead of turn-then-move, a single line-of-sight arrow, two probes, return-home objective, logical clue assistant and note system. No upstream art, music, CDN code or dependencies are shipped. Four optimized local WebP gameplay illustrations derived from one GPT image-model atlas: floor, lantern, cave creature, crystal. Upstream license notice: MIT License Copyright (c) 2021 Thiago Ferreira Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.