[Another HTML5 2D game framework][link], built mobile-first. Supports TypeScript and JavaScript. Looks pretty fast / simple, and it’s used on the awesome [Game Mechanic Explorer][gme] site.
[link]: http://phaser.io/ “Phaser – Desktop and Mobile HTML5 game framework”
[gme]: http://gamemechanicexplorer.com “Game Mechanic Explorer”