Writing a Tetris game in JavaScript

In this episode I write a Tetris game in JavaScript from scratch. We will look at * How to draw on a canvas * Rotating a matrix * Rudimentary requestAnimationFrame listening * Handling keyboard input Since we are writing ES6 this code might not run on all browsers yet. I was running Chrome 53 when I wrote this and if you wish to follow I recommend you do too. The initial HTML can be found here: