How to capture all clicks from user
You can use Google Analytics Event Tracking module to track mouse click and other events. This module provides a hook where you can track click events.
From module page:

Event Tracking is a way to track user interaction with out registering a page view.
This module allows an interface for Google Analytics event tracking capabilities. It provides a hook for other modules or &quot;glue code&quot; and also has some handy drush commands.