What do you do if you can’t finish your novel?   Make an iPhone app.   Writer Mark Wernham, author of the mystery novel-in-progress, Jefferson Greenspan Saves the World? partnered with chip tune musician Matthew C. Applegate (Pixelh8) to develop Machine #69, a collaborative story app that features photos by the author, narration by voiceover artist Dan Russell, and music by Jack Dangers of Meat Beat Manifesto and Devo’s Mark Mothersbaugh. There’s even an “old” radio interview with the author.   Mark Wernham plunges you into the middle of the action, introducing a time-traveling salesman, Jefferson Greenspan – who’s on …