Listen to the story about LEFTy Elfy. As you listen to the story every time you hear the word "LEFT" pass the gifts to the elf on the LEFT. Every time you hear the word "RIGHT" pass the gifts to the elf on the Right. The elves holding the gifts at the end will reveal your code. Here is a tip, "LEFTy" makes a move.
Note: You cannot move the presents on the screen. You must figure out how to keep track of their movement.