iPad Game with Physics

Dear iPad apps developer, I want an iPad game developer who have great experience in development of iPad / iPhone games. The game will be similar with this flash game: [login to view URL] We will provide you with graphics, and sounds. so this job is just pure programming. The game required some physics mechanism in this puzzle game. The game must be smooth (no crash). The game must be able to share with people through Facebook and twitter. Some more tabs like, about us, featured game, share with friends. Have at least 30 different levels on game which feature with rank, and score. Able to update from time to time easily. Looking for serious, responsible, experience, easy to communicate, easy to find, good programming, programmer / game developer. My budget : $500-$1000. It is better if can show me your portfolio that developed in the past. Thank you and regards, Happy Bidding