You can do many things in ExLight. As a matter of fact you can do anything you can do in a “ordinary” Ubuntu/Debian system, but I suggest that you start doing this.
B. Listen to your favourite music in Spotify. Install Spotify by running the command sudo apt-get install spotify-client. You can of course do it while running ExLight live (from DVD or a USB stick).
D. In ExLight Build 170105 I’ve added Refracta Snapshot, which make it possible for you to create your own live installable Ubuntu system. I mean change everything to your liking, fire up Refracta Snapshot and wait 3 – 5 min until your new ISO is ready!