Design Analysis
Learnability - One of the downsides to this design is that the icons do not have any text associated with them. So although the icons represent visually what they lead to, a new user may not know what they are for until they click on it to find out. Another learnability issue is that currently there are no affordances to let a user know that they can click on a building to see the stories associated with it. One idea would be to add "pins" on every location with a story, but that could lead to too many pins and overwhelm a new user. A plus for learnability is that the map is always visible, so that the User can always see where they are.
Efficiency - By placing the icons in the corner and to the side, we somewhat increase efficiency by Fitt's law (the "size" of the icons grow on the edge). Having the time left and the guide name always at the top ensures that the user never has to go to another page to see it. In fact, every task is done on the same page, but with modal dialogs or sidebars doing it. This way, the user does not have to go through another page to get to where they want. A downside to efficiency is that the Tour guide has to linearly look through every question instead of seeing them all at once.
Safety - Every "mode" (i.e. clicking on the question mark or calendar) that triggers a sidebar can be undone by clicking on the icon again. A downside is that theoretically, the map is still "active" after triggering a sidebar. So if the user accidentally misses the text box on the bottom when asking a question for example, they could land on a building on the map instead and trigger the stories view, confusing them.