Dear Mike,
I can implement both iPhone and Android version of this game in 2 weeks, and another 1 week for the maintenance.
I am a very experienced developer, however I do not have a game in iTunes Store because I am doing Academic Research since 5 years.
I can guarantee you the quality of the game play, speed, etc. This game does not require super Physics knowledge. Basically, most of developers can implement it. However, only few people develop software in the proper way.
Good luck...