I already blogged about Kiwi.js in the post Introducing Kiwi.js framework with the creation of an HTML5 Spellfall prototype, and now I am happy to hear the engine features a plugin which allows you to use Chipmunk2D Physics.
While I am creating a full game prototype to show you the capabilities of this engine, I want you to look at one of the official examples:
* Click and hold on top of a Object.
* Move the cursor in a direction.
* Release top send the Object flying in that direction.
Have a look a the official plugin page and stay tuned for a series of tutorials.