index.html was assembled by Sayo inspired by this YouTube tutorial https://www.youtube.com/watch?v=4dHlbXigtss
test_game.py was added by Jean to run the game
python test_game.py copies the necessary files to a fresh, uniquely named folder, starts a web server, opens a browser running the game. The game should work.
The game appears to require an old version of phaser.
python test_game.py old uses the phaser.min.js from the phaser_old folder, v2.7.10. The game should work.
python test_game.py new uses the phaser.min.js from the phaser_new folder, v3.1.2, copied from https://github.com/photonstorm/phaser/blob/v3.1.2/dist/phaser.min.js. The game does not work.