Demo for a tutorial showing how to use localStorage to save data in a very simple Phaser 3 game.
The demo can be found here.
The tutorial is available here.
Place all the files on your local web server and navigate to index.html.
This is a clicker game; you earn points by clicking repeatedly on the Phaser logo. Your score is displayed in the top-left corner. If you leave and come back, your score will be unchanged because it is stored in your browser's localStorage!