With this technical abilities developing iPhone games need lots of creativity from the game developers so that they can produce intuitive, eye candy and engaging games for wide range of audience for that they need to include amazing features for better user experience like:
-> Games should be improved with rich audio & video blends apart from astonishing 2D & 3D animations
-> Game design should be such a way that it increases the interactivity for game lovers
-> There should be sporty setting and good-looking layouts
-> Exceptional design based user interfaces
-> Style a scalable and strong framework behind game apps
-> There should be dynamic & tricky game environment with eye candy graphics
-> Imposing graphics and lively game boards for experience these astonishing features.
-> Try to develop games for different age group of people like some for kids and some for adults
If you have an idea developing iPhone game you can go for custom game development and outsourcing companies are the best in quality and cost effective option for you.