https://www.w3schools.com/html/html5_canvas.asp
https://developer.mozilla.org/es/docs/Web/API/Canvas_API/Tutorial
Demos:
Librerías Canvas:
Fabric
http://paperjs.org/
https://phaser.io/
Otras:
https://ihatetomatoes.net/guide-to-html5-canvas-javascript-libraries/
