[habosa]

Wow could you please consider open sourcing it or posting a small tutorial? I'd love to learn how to do something this beautiful without a game engine.

[grantland]

I won't be open sourcing it, but I might consider writing a small tutorial at some point.

For now, you could dig into the Android source code to learn how to modify drawing, layout and touch events of Views and ViewGroups. Here's also a good post on Animator: http://android-developers.blogspot.com/2011/02/animation-in-...