I am currently developing my own iphone app for people who enjoy playing physics puzzle games. The early levels are designed to entertain the casual iphone gamer and the tougher levels are designed for the dedicated players.
I would like to convey that the game is fun and addictive and if completed you probably have OCD (Obsessive–compulsive disorder).
People who enjoy accelerometer based physics puzzle games like labyrinth. This game is based on this flash game:
Any one familiar with Apples app store should know what app icons look like. Attached are some sample game design graphics as a reference to what the game will look like.