It's available on http://rogeriopradoj.com/
You must have composer installed.
A best practice is to verify if everything is ok with your environment, using diagnose
tool:
composer diagnose
Perhaps you should update your composer:
composer selfupdate
After that:
# install the dependencies
composer install
# or if it as long time since the last run, update the dependencies
# composer update
# run sculpin via composer script alias
composer serve
# or via actual script
# ./vendor/bin/sculpin generate --watch --server
So visit http://localhost:8000/ on your browser.