Changes made for this site
Original: https://github.com/selenebun/bullethell @ 75173f8c37868ac7f30b886da6d28560e8e4418b (MIT, see LICENSE; Copyright 2020 Amelia Clarke)

- Copied index.html, style.css, scripts/ (game code unchanged) and LICENSE. README.md was not copied.
- p5.js library: the repo bundles the minified p5.js v0.6.0 (scripts/lib/p5.min.js, LGPL-2.1). We serve the
  unminified, unmodified p5.js v0.6.0 build instead (scripts/lib/p5.js, from the npm package p5@0.6.0, lib/p5.js;
  the minified file in the repo is byte-identical to that package's lib/p5.min.js apart from line endings),
  so the complete library source is included. Its license is in scripts/lib/LICENSE-p5.js.txt
  (license.txt from https://github.com/processing/p5.js at tag 0.6.0). index.html now loads scripts/lib/p5.js.
- Removed the bundled font file fonts/SourceCodePro-Regular.ttf and its @font-face rule in style.css; the sidebar
  text now uses a locally installed monospace font (Consolas / Courier New / monospace).
- index.html: added a viewport meta tag.
No gameplay code or graphics were changed.