In this paper, we present a unified framework for mobile game development. To develop a new mobile game, we need three main entities: game scenario designer (i.e. producer), game graphic designer, and game programmer. Traditionally, there is no systematic support for inter-communication among the three entities. In our scheme, we support co-operative development platform, and three main developers can easily show their idea and also can easily integrate their works. For early stage of game development, we support a scenario simulation tool, where the producer can show his/her idea using the graphical clip made by graphic designer. Once the idea is setup, the graphic designer makes the graphical contents, and delivers to programmer to integrate with mobile games. However, mobile game usually requires efficient memory usage; the programmer should optimize the graphic content. In our platform, we support automatic optimization toolkit and the graphic designer does not need any optimization, and he/she can re-use the graphic content. We applied our platform to WIMAX and CDMA mobile set, and the efficiency and reusability are guaranteed by our automatic optimization.