Grace's Playground
Seven small games, one for each idea on Grace's birthday list. They all run in the browser, they all work on a phone, and none of them need the internet once the page has loaded.
About the playground
Every drawing here is code. Nothing is fetched from anywhere else, there are no fonts to download and no tracking, so the whole thing is a folder of plain HTML, CSS and JavaScript that will still open in twenty years. The one game that needs a picture uses whichever one you give it, straight off your own device.
Scores are kept on your own device and go no further. Clearing your browser data clears them.