Tiles and screenshots were abstract shapes. Each is now a small scene for
its genre, with several layouts per genre steered by the game's tags, so
no two games look alike. The screenshot script pins the browser's date so
the Game of the Day doesn't change between runs.
The README's screenshots showed real games whose authors never agreed to
be featured. scripts/demo/build-demo-data.mjs builds a Flashpoint install
of invented games with generated art, plus Pixel Penguin Panic, a small
HTML5 game written for it. scripts/demo/take-screenshots.mjs retakes the
screenshots from an app running on it.