Get the Pixelpulse source from GitHub:
git clone https://github.com/nonolith/pixelpulse.git cd pixelpulse
Chrome can't run Pixelpulse (without precompilation) from a file:// URL because it uses XHR to load the coffeescript source and LESS styles. (Chrome bug) You need to run a local web server to test your changes.
python -m SimpleHTTPServer 8000
Then visit http://localhost:8000/pixelpulse.html
Pixelpulse uses Coffeescript and LESS which are compiled automatically when loaded from a git checkout. The in-browser versions of these tools are included in the git repository; you do not need to have the compilers installed.