iPhone game graphics

We are a company developing games for iPhone and iPad. Looking for a graphics designer to create attractive graphics for existing and new games. Bidder should have iPhone4 to test graphics on the real device. iPhone graphics design experience is welcome. As a start point we need new graphics for the existing game to update. It has name LetterTower and is available in the Apple App Store for free. Graphics needed: - Icon - Splash screen - Game screen background - Colored tiles for letters - Other elements (menus, buttons, etc.) - Recommendations for the required animations will be appreciated. Please send draft design for the GameView (see attachment) to make a decision.