The Link
Linking is enormous fun, the heart and soul of screen composition. But it is tricky, and the more complex your ideas, the more challenging the creation of a coherent linking structure becomes. A simple linking scheme (for example, linking the end of the one screen to the beginning of the next, as I have done in this segment of the web site) allows the reader a quasi-linear exploration of your work, which ensures that all your work is read, and in an order which you, as author, largely control. In this case, because I want to convey information in a specific order, I have thus limited navigational options.
A more complex or playful linking structure (one which follows themes, for example, through a sequence of screens, and/or one which offers the reader/viewer more than one link from each text screen) exploits the medium's associative potential. But it may also confuse the reader, or set up a sequence of paths which miss some of the key text segments in your composition. Use the drafting process to experiment with linking structures. Maybe thing of offering alternative linking structures, to allow your reader/viewer to choose the approach that best suits her needs as reader/viewer.
Most authors have both an idea of the structure of their work, and its content before they compose. Some composers have an idea of what their content might be and how it might be linked before they write, and tend to develop both content and linking pathways as they compose. For your early screen-based compositions, it might be easier to develop your potential content first, and then work out how it might be linked into a coherent whole.