Here you can find a number of examples that cover various Substance API's.
You can start playing around with the code by cloning this repo and starting the dev server.
$ git clone https://github.com/substance/examples.git
Unless you want to make contributions to the lastest development version, please checkout the master branch which shows usage of the latest Substance release.
git checkout master
Now install dependencies and start the dev environment.
$ npm install $ npm start
Now you can navigate to http://localhost:5555
Please create an issue in the Substance repository.