Documenting Interactive Projects
You should describe the interactivity in as much detail as possible and document the process through another medium such as video. You should describe the content and the context in as much detail as possible. If your project cannot survive in it's initial state, you will want to save as much of the project as you can with the tools available.
Examples of this type work have been done by Dr. Dene Grigar, Director of the Electronic Literature Lab at Washington State University Vancouver.
Pathfinders: Documenting the Experience of Early Literature Online
Rebooting Electric Literature: Documenting Pre-Web Born Digital Media