I wrote my game (game logic, graphics, sound), Smallworld, in 6 hours over the weekend (3 x 2 hour stints). It's an homage to 8-bit side-scrolling games of the 1980s. It's the first time I've written a game, and the first time I've used the Phaser framework, which is a superb framework. For the graphics I've used a combination of Piskel and GIMP, and for the sound beatbox.co