I'd like to know the same thing, please, albeit for slightly different reasons.
I bought Osmos HD and have greatly enjoyed using it, but thanks to the fact that Asus' buggy updates have made my Asus Transformer TF101 tablet hopelessly unstable, I want to move to playing on my HTC One X smartphone instead. Thing is, I've put in many hours of gameplay, and don't want to start over from scratch. Both devices are under warranty, so I can't root to use backup apps.
One way or another, I need to wipe my tablet soon. I'd like to be able to save my Osmos HD gameplay so I can do that. If I can't backup my data, I really can't see myself playing the game any more in the knowledge that my next wipe or hardware replacement will lose all my data again. Hence, I'm really hoping there's a way to do this, or a backup / restore function can be added...