Another Design Tool Available
Found another design tool similar to Genially that performs the same functions and allows you to design drag and drop RPG adventure modules.
It is a little more expensive but it does have a few more bells and whistles from what I can tell without signing up for a paid account.
Both design tool offer free versions that you can use to design for your own use.
If you are a Game Master simply looking to reduce prep time and make your modules easier to run then this approach could work well for you.
So, besides Genially I have found this tool called Visme that is at least equally as good if not a little better in some ways with additional tools and design capabilities.
You could create more visual tricks, manipulating elements, revealing or hiding information.
I still believe this style of interactive design is the better approach than a PDF for adventure design.