On your iPad (or other device of choice), you'll see a set of controls on the upper right portion of the screen;
Press the Stop button;
You will notice that after the app stops, the Floor Projection displays the Sensory Guru logo instead of the User Interface as it initially did.
This is because all of the control is now carried out using the Sensory Guru Magic Carpet Controller App on your device. You control which app plays and stops using the Control App, you'll see the logo between apps.
Now you know a little bit about how they work, perhaps you'd like to go and discover the many different themes, games and activities on the system?!