Game graphics design

We are working on developing a computer game. We have developed a number of concepts and starting working on creating working prototypes, which will be used to test out the concepts and the game play. If the prototypes are successful ,we will proceed to create complete game(s). We are looking for experienced graphics designers with 2D graphics and animation experience who will have to create the look and feel of the game as well as all graphics elements, including game background, objects of the game, control buttons, and other graphics elements. It also includes creating elements of the animations (animations will be implemented programmatically but we need the graphics designer to create all the frames of the animations). The goal of the current project is to create a look and feel of the game, which is simply a picture with the background, game elements, control elements as if it were a screenshot of a game in progress. The picture should be in 4 resolutions: 800X480, 800X600, 1024X600, and 1280X800). To protect our intellectual property we're not including the full description of the game in the project definition; you can receive the detailed description of the game after signing the non-disclosure agreement with us. To give you an idea about the complexity of the work, this is a logical game similar to Tetris, Lines, Bejeweled, etc. If we are satisfied with the results, we will initiate a new project which will result in creating all images used in the game: separate background, buttons and control elements, game objects in all animation frames, etc. Thank you for your interest and looking forward to working with you.