I implemented the Game of Life a couple of months ago with vanilla JavaScript, but I wanted to re-do it after learning React & Redux to test my chops. It wasn’t as easy as I expected, but I definitely learned a lot doing it!
(There’s a little bit of Sass in there too because I wanted to practice that too, and once I learn how to use Immutable.js, I’d like to throw that in as well! This is steadily becoming something I’m using to practice everything, haha.)