Damn, I really wish I had an Android device just to play this. I was always a big fan of Super Mario Galaxy which makes me think I'd like this game too. Did it influence your design at all?
I can't resist pointing out that there's an x86 Android distribution available -- you can create a small partition on a desktop or laptop hard drive -- say, 20 GB -- and install it, then set up dual boot. It beats having to buy an Android device just to have an occasional exposure or run a test.
Good news: free, runs on x86/64 machines.
Bad news: only runs Android programs that either don't have any native code, or that have multiple native executables for different platforms.
More here: http://arachnoid.com/android/Android-x86