Huh. That's definitely odd. Somehow, that app thinks you are on an iPhone/iPod. When I put it on my iPad, I got the fullscreen affect, not that little box as in your pictures.
I don't really know what to tell you to fix it, especially when you said you got the iPad version.
Oh, try this. Put your iPad into Safe Mode. Then, run the game again and see if it loads properly. It may be something about a tweak you have loaded in your jail break... Maybe you have an iPhone theme or something that's confusing the game.
Not that I'll know what to do if it IS, but at least you'll have a start for talking with the developer (which, honestly, I think you'll need to do).
Marilyn