Matt Mitman, designer and developer on JOUNCE gives a indepth interview on GarageGames.com. check it out HERE!!!!
Excerpt:
"What was your development process like?
Jounce was completed extremely fast. All told (not counting playing the game), I put in around 20 hours of work into v1.0, and Tim spent a couple hours packaging up builds for testing and finally submitting to the iTunes App store. I created all of the gameplay related parts myself, and then Tim did the Mac port/submission side of things, so just two guys on the dev team."