IPhone/iPad game app developer - 2D endless runner

I am creating a continuous runner game, like Jetpack Joyride, however the concept of the game is completely different and the character would be chased by another character whilst avoiding obstacles. I have designed the level, characters, menus, pause screens etc. I simply need it animated and functions added to my still images from Adobe Illustrator. I have also built all of the characters with separate layers so that they can be animated efficiently. e.g. arms, legs, torso etc. are all separate, moveable components.

Please let me know if you can help :)