First install the dependencies with npm install.
Run npm run start, which should automatically open
http://localhost:3000.
The primary game code is in src/play-scene.js, with src/props.js and
src/game.js as supporting files. Assets are under src/assets/.
Update package.json as needed (e.g. for game name, author name, etc).
Run npm run build then put the build/ directory on a web server.
To deploy to a location other than /, update homepage in package.json.
The MIT License; see LICENSE.md.