Not only do you get a score, you can also edit and play with the questions from embedded code snippets.
You can also add your own questions in the app by modifying the JSON.
To deploy LWC Recipes Open Source to Heroku - there's a button for that.
Start simple by running
yarn watch (or
npm run watch, if you set up the project with
npm). This will start the project with a local development server.
Find more information on the main repo on GitHub.