Demo 4 has two hotspots and both go to Demo 5. One is short and wide near the top left, about 126 by 44 pixels, the proportions of a menu item or a tab. The other is a broad area on the right. Again, the tour catches more than one way a viewer might try to move on.
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.