This version was made it using webpack (4.18.0) and some plugins/libraries to load, extract, minify and package the application without use a framework to write easily JS. As a part of these plugins, autoprefixer give us capabilities to cover many last version browsers and understand CSS3 (IE 11, Edge, Firefox, Chrome, Safari, iOS Safari, Opera, Chrome for Android, Samsung) so you can display it in your mobile and have fun.
Because isn't a complex exercise was written with a basic and understandable architecture of Javascript but using some advangates of ES6 (arrow functions, scope variables declarations, literals, etc.) and use babel js as transpiler, so you can take a look and see how easy is read it and modify.
Download the project first, then install dependencies by npm
npm install
And run it
npm start
If your want to get a PRODUCTION version just run
npm run build
Then take a look inside /dist folder