Simple 2D vertical scrolling iPhone game

In short: I want to produce a game similar to Car Racing (by Yao - [login to view URL]) with a few design changes, different graphics (2D from a sky perspective as the example, though), sounds and music. More details: - I will provide the graphics, music and sounds. But I need you to tell me the desired resolutions. - Playable on iPhone 3 & 4 & iPad - Possibly Android later at an additional & separate cost - Retina support - I will provide a Powerpoint design document & some playable examples of mechanics on PC. - A simple Nag screen - Gamecenter leaderboards - Support AdWhirl for integrating ads from different services - I have been in games before but this is my first mobile app. I would appreciate your help and advice during the process and in submitting the game to the appstore. Payment: - I will break the project into milestones together with you. - E.g. the following: 1) car running on a scrolling street controlled by tilting (10% of full payment) 2) other cars added + menu and two game modes (30%) 3) Beta (everything working) (20%) 4) Final build (20%) 5) approved by Apple (20%) - The first milestone acts as a test for your quality - After accepting a milestone, I will release the next payment. - I will be updating the app later and am hoping for a long term relationship with you Your offer: - Let me know what apps you have previously worked on - How soon you can start - Good communication skills in English are a must for you. - Start with the words 'DoodleCar' so I know you read this - Let me know in a PM an additional cost for implementing an in app purchase (to full add free version with more tracks) but for this budget assume that there will be both Lite and Full version to be submitted to the app store - I need to get full ownership to the source code - We will sign a simple NDA before I give you the full details & design. You can then update your quote if you need to. Desired communication: - Freelancer messages, Skype, Email.