The latest installment of FierceDeveloper's Developer Workshop series profiles the Rocket Racing League's effort to grab the attention of casual gamers with the promise of high-speed aerial acrobatics. RLL officials are relying on the mobile platform to nurture interest in the sport: The $2.99 Rocket Racing League title for the iPhone boasts single-player and head-to-head gameplay spanning four race types as well as five track locations. The app is the first in a proposed series of multi-platform games inspired by the real-world RRL, a fledgling competitive league featuring rocket-powered aircraft navigating through three-dimensional virtual courses projected 1500 feet above the ground. Special feature