The aim, in focusing on Larson’s offcuts, may be to deepen your understanding of the composer, though Tepper and Simpkins don’t veer far out of the realm of fandom. You’ll find an insert in your program with the names and short histories of the 18 songs that Tepper and Simpkins have assembled into The Jonathan Larson Project. But the show itself goes by without much of a lesson plan from the stage, flowing between songs without introduction or editorializing. I kept peering down in the dark trying to work out the origin of each song as it was performed. That structure maintains some momentum, though it puts the show’s aims in opposition. Are we here to learn more about Larson or simply to laud him? (The latter, mostly.)