Thanks to the efforts of Marco, who is testing the demo, a flaw in a built-in Unity function came to light. This function was causing crashes on some computers when loading new scenes in the background.
I am currently going through the code of the demo and replacing the background load with a normal one. This should resolve any crashes any of you may have had while playing the demo.
This new version will be available by tomorrow evening (January 8th).
I'm busy working on my blog posts. Watch this space!