I'm afraid it not good news.
Your tours takes forever to show. When it does, there was no sign of a loader.
You need to remove the Map buttons as they aren't doing anything apart from being confusing because a graphic is sliding across the screen.
In theory 3500x1750px sound about right for Flash mobile devices with up to 1024px screen resolution. Based on 3500x1750 each scene should be well under 1mb each.