Phaser is a free game-engine that uses JavaScript. In preparing this last packet, I owe a big debt of gratitude to the makers of this software and the materials they provide on their site.
Link to main page of the Phaser 3 site.
Link to the excellent tutorial, Making your first Phaser 3 game, that I borrowed heavily from.
Link to CodeAcademy.com. I used their free Phaser course as a refresher and a different perspective on the material.
Link to the skeleton sprite sheet. Each individual image is 32 by 48.
Link to Tiled, a map editor.