Racing style game on iPhone and iPad

I am looking to create a 2d racing style game from scratch. No payment will be made until the app is submitted to apple (50%) and then remainder once on the app store. The game will need to be playable on both iPhone and iPad you will be required to sign a non disclosure agreement The game will need to be in HD, and a world class user interface. Displays to include actual game (My Car on part of track), and the full map (on the top third of the screen) which actively shows other vehicle information. There will be numerous levels based on individual features where a user can move from one car to another. There will be four Maps on the first of our projects. Map one will have two levels. The other maps will have 5 levels each (based on race objectives and speeds) I will expect the app builders to create all aspects of the game including all the intelligent functions (such as cars driving around the track and users being able to change cars, and user being given objectives such as getting from one part of the map to another and the device knowing when the objective has been achieved etc), the graphics etc, scoring, timers etc will all need to be sourced by the programmer. I will expect the game to be added to game centre. There will be an IAP to go past the first track. There must be a rate app function to go past first level. Developer must have sufficient english speaking to communicate with me.