A Web build of QuantumQ would work without installation with most current browsers

• https://docs.godotengine.org/en/stable/tutorials/export/exporting_for_web.html#doc-exporting-for-web
• https://foosel.net/til/how-to-export-a-godot-4-game-to-run-on-the-web-on-itchio/
• https://www.reddit.com/r/godot/comments/kdta24/comment/gg149pa/ :

  Note that itch.io isn't the most optimized platform for uploading Godot HTML5 projects, since it serves projects' .wasm and .pck files without compressing them. In contrast, GitHub Pages will compress those files using gzip on the fly.

• https://docs.godotengine.org/en/stable/tutorials/export/exporting_for_web.html#serving-the-files
  • https://github.com/gzuidhof/coi-serviceworker :

    Cross-origin isolation (COOP and COEP) through a service worker for situations in which you can't control the headers (e.g. GH pages)

• https://docs.godotengine.org/en/stable/tutorials/export/exporting_for_web.html#gamepads
  • tabindex // arrow keys / gamepad d-pad support