If you are searching for a tutorial on how to develop a games for mobile devices, you can’t miss this great resoruce from Forum Nokia :
Designing Isometric Adventure GamesThis document discusses game development, specifically the designing of an isometric adventure game, from mobile perspective. It takes a look at the design process, content creation (graphics mostly), and finally deals with the programming issues. The discussion is mostly general, but an isometric example game “Into the Darkness” written in C++ for the S60 platform is frequently used as an example.