I've just released my latest game - Pairs! It's a memory puzzle game where you match pairs of shapes based on their colour in the fewest moves possible. Pairs is available on mulitple platforms, including for free on the web, as a free Android app on Google Play and Amazon and as a desktop download - just look how lovely it looks:
About Pairs
I made Pairs in Javascript and HTML5 using the Phaser.js framework; this allowed me to convert the initial web version into a variety of different formats very quickly, which is a huge advantage of using HTML5 as the basis of a game.
From the initial web game, I used Cordova to create an Android app (and soon an iOS version) with minimal tweaks to the code, and then node-webkit to create a standalone desktop app. This worked really well, and meant I could use almost exactly the same code to create versions of the game on multiple different platforms (brilliant!)