Generally speaking, you would store all the data in a text format of your choice (recommend json), with all the relevant information needed to generate and display the choices.
You need to decide what that is going to look like. For example, for each room you would need at least the room number, description, and a list of choices.
Then for your layout, you would look up the room number in your data file, and display the information there. Create as many choices options as there are choices (they're all the same object), and set an instance variable from the data that determines what happens when you click that object (for example the target room number). Each choice might have a description as well. Json is flexible, but it's up to you to decide what data is relevant.