It did not have a file path by default, but had an index.
Also, the camera on Seek/Flee caused the Go Back button not to show.
The scene's been amended and the camera removed, since it wasn't
actually useful.
Used `var variable := 0.0` as discussed in the Godot issue, instead of
`var variable: = 0.0`.
Mostly these are minor/cosmetic changes, but I've also reorganized the
folder structure (naming of folders) to reflect our guidelines, plus
made some minor changes to the demo codes. Still work in progress.
