What is the recommended why of using derby.js

I'm trying to figure out how to install and use derby.js. I have installed node.js version: 0.8.17 I have cloned derby from github, and installed, version: 0.3.13 I have installed derby-examples, also version 0.3.13

The examples don't really work.. the page renders but nothing dynamic happens.

What am I doing wrong? What is the correct why of working with derby? should I install with the package available with npm, or do I need to use github?

I can't make it to work... going crazy

Thanks!