Before, when a stack of three would hang over the edge and then fall, the stack would rotate from the cube that is farthest in the direction of motion, as it would on solid ground. Now, the stack figures out which cube is the farthest toward the direction of motion which is still on solid ground , and rotates from there instead. Also shown: a stack of three can walk width-wise along a path of 1, as long as it is balanced. Also shown: when the stack presses a button and then rolls off the edge, the button needs to stay in the same pressed state while the stack resets itself. Otherwise, falling back in would count as another button hit and change the state of the game! That's cheating. The way it was before.