Why use Pixel.js? Here are a few reasons...
Add support for IE9+, FireFox, Chrome and Safari with a single code base without worrying about platform specific gotchas.
Add your own game components and media assets with ease by utilising Pixel.js' extremely simple inheritance model.
A simple API and object model that will be familiar to experienced developers and newcomers alike.
Pixel.js implements a number of optimisations out of the box for you; allowing you to spend more time getting creative.
There are no charges for commercial use and no restrictions in how you utilise Pixel.js! See this page for more details.
To help you get started, a number of built in assets and components are available for you to utilise and extend upon.