The description suggests that we may use tkinter - but in what way? The tkinter canvas element makes it possible to even render 3d maps, which of course is too much, but where is the border? Can it e.g. be used for choosing dialogue options from menu and displaying thematic graphics?

You don't have to use tkinter. I said that if your using tkinter then your allowed to create a .exe file.

I'm not experienced in Tkinter. But you can use dialogue options and render maps. As long as it's ofc text adventure.