From the Hasbro website:
Twist it, pull it, and take the game out of this galaxy with this R2-D2 version of the classic Bop It game! This "Star Wars" version of the classic Bop It game works just like the original, but with an intergalactic twist. The game commands you to take certain actions in the voice of C-3PO, and you have to respond as fast as you can. If you get it right, you get another chance – but if you don’t, you’re out! The commands get faster the longer you go on, and you’ll hear the sounds of the loyal droid R2-D2 as you play. you’ll have to be at the top of your game to win at Bop It R2-D2!