It looks like you have designed a great bot, same as last year. Here is my guess as to what it does.
The stacker is capable of stacking/protecting 6-8 high stacks, and the robot has an easy way to rotate boxes. The wings are for knocking down the boxes at the beginning, and possibly for corraling boxes for stacking purposes.
Congratulations, another quality bot. I am looking forward to watching the Chesapeake regional on NASA
