The single hotspot on Demo 8 runs from 641 pixels to the right-hand edge of the 800-pixel canvas, 80 pixels tall, and leads to Demo 9. A target flush against the edge is where most people look for a next control.
The frame above is drawn at the original proportions. Each dashed box sits where the 2009 hotspot sat and links to the same screen it did then, so the tour can still be walked end to end.