After some considerations and feedback on GDC next I have come to the conclusion:
My opening screen and App store screenshots sucks!
There are many games out there that are getting thousands of downloads and they usually have one thing in common: They have well designed opening gfx and several that usually shown in the App store.
Now, the gfx must reflect the in-game content or have some special character that is seen though out the game. My game has ballman, which is a spongebob-relative that I hope to develop in the coming months and game updates.
You can check the game out here: https://itunes.apple.com/us/app/id640096010?mt=8
If you have a gallery/website/examples and is interested in helping me, please reply here.