Selecting the CREDITS menu option yields an animated roll of thanks and copyright info.
Some of the points included are:
Bot graphics are modifications based on work created and shared by the Android Open Source Project and used according to terms described in the Creative Commons 2.5 Attribution License.
Thanks to Ray Larabie for sharing his free fonts with the world, in particular "Good Times" and "Forgotten Futurist".
All other code, graphics and music being copyright 2010 Peculiar Games and P.A. Casey (crow).