Hi! Thanks for asking. To answer your questions:
- Yes, your entry can just be sounds or text (or even just text, like some interactive fictions do, see this example).
- Your story doesn't need to have branching paths (the project I'm preparing for this jam is kinetic too!).
- If it's just a PDF of a written novel, it wouldn't be a valid entry for this jam, it still has to be reminiscent of Visual Novels and/or Interactive Fictions.
Hope it can help you! Good luck with this story of yours, however you choose to share it to the world!