I am an experienced Unity developer, having worked on games such as Skyline Skaters ( [login to view URL] ) and Airheads Jump ( [login to view URL] ) .
The controller scheme requested should be simple enough to do. What kind of UI system are you using in Unity? I have experience with NGUI, DFGUI, as well as Unity's both old and new UI systems, and I can quickly learn any new UI system as necessary.