First off, why is this app not iPad / HD compatible. Shame.
This app has some solid potential to help boost the Hubbles perception and standing if it more thoroughly and deeply engaged and provided value. No, I dont mean plugging some stupid social networking hook. I mean value through explanation of images and what their significance is or provide some sort of reward for leveling up while choosing pictures other than just a message indicating that the next "level" has been achieved. There are all kinds of other possibilities, like explaining how Hubble contributed to different technologies and comprehension of the universe. In summery, this has potential, bump heads and be creative.
doxzero about HubbleSite