Two small improvements to the demo:
Mouse sensitivity is now adjustable in the settings menu — keep it low for slow, calm looking around, or crank it up if you want to spin faster.
The help screen now better shows how to move through the tool menus in the top right of your screen, so that part of the UI is clear at a glance.
And a little bit of new content has quietly been added to the demo too — a small surprise for anyone in the mood to wander a little further.