So after my first design I based that on many popular game that just have their sprite as their app icon, for example Flappybird or Angry Birds. For this second design i have added the name just to make sure the buyer knows what the game is called even though the name will be underneath the icon on the App Store.
Here is my second design:
So I was thinking that every app or game as a icon on the app stores, so I decided to create my own. I had a look at some templates I could use to and I came across this website called http://appicontemplate.com/. Appicontemplate has templates for IOS, Desktop, Lanucher and screenshots for both Iphone and Ipad, and also shows it in every dimension that it needs.
Here is my first design of my app icon: