Robocalypse Missing???

Hi Guy's,
just got my iPhone 4 WOHOOO!!!! Anyway, been testing all my games and apps, I've reinstalled the ones that needed doing as they won't work from the restore.
But, my Robocalypse won't work. It starts to load then crashes back to the home screen. I rebooted the iPhone, deleted the game and then reinstalled from my backup in iTunes.

So, I went onto the app store to re-download it as that's worked with my other games, but this game is NOT THERE???????
I've searched and looked, looked through the app store on iTunes but it's no where to be found?

This is the game:
http://www.robocalypse.com/iPhone/#/home.html

Has anyone got any idea's? I love this game and it's one of my favourites. I just checked and the game does the same on my 3GS phone so it's going to be IOS related.

 

Sorry, just saw the thread for 3rd party applications. Can a mod move this there?