Very nice gallery!
The pause time in auto tour is 3 seconds, but you can change it programmatically with the following setting:
WALK.AUTO_TOUR_IN_VIEW_STILL_TIME_MS = 3000;
Unfortunately it is not possible to visit hidden views if auto tour. You would need to program a custom tour functionality using the switchToView and onViewSwitchDone Javascript functions: (see View switch section here: GitHub - shapespark/shapespark-viewer-api: JavaScript API for interacting with the Shapespark 3D scene.). A rough idea would be to iterate through all the views directly from your code with some sleep() between views and some custom UI control to start/stop the tour.