I am not sure if there is any global setting or camera setting which would need to be changed so that the reversing can be visible, currently in game mode the formation block is all jittery.
Though i had attached the screenshot it doesnt give the actual picture…please check the debug log below and that would show that the formation boundary and camera boundary are very close and i am unable to change the camera boundary setting so that there is bigger screen for the formation to move left and right.
[Note]: When i maximize on play then i could see movement from left to right and back. I had tried to reduce the sprite size to decrease the object size but still the formation wire-cube is big and it is almost near to the camera view port. When i maximize on play the camera view point increases and hence seeing some movement. Need help on how to decrease the formation wire-cube or to increase the camera view point.

