I'm building a clone of one of my favourite word games, Word Dojo. Found on the Megatouch arcade machine thing, it's a fun game where you string together letters to form words, à la Boggle.
Built primarily as a learning exercise, the game uses React components and the Flux architecture, a combination which has been working splendidly. High scores are stored remotely in Firebase, and I use Gulp for the build system.
I wrote a blog post on some of the things I've learned; I made a few mistakes in it, but there's some solid info in it.
Clone the repo, run 'npm install' from a terminal to fetch the requisite packages, and then run 'gulp' to build the JS/CSS and launch a development server. A browser should open automatically, but if not you can navigate to 'http://localhost:8000' and see if you can beat my high score.