You can use Darth Vader unlimited time in this level when you damage Palpatine enough.
This is the only boss levels in Angry Birds Star Wars that you earn 10,000 points for finishing boss.
The music is stop playing when Darth Vader is your side. If you replay this level in this session, the music won't be played.
If Vader jumps on the Slingshot while other bird is jumping on the slingshot in the same time, there will be two birds on the slingshot at once. Trying to shoot the bird from Slingshot will crash the game.(To perform this player needs to quickly launch a bird while Palpatine is already defeated, before that bird jumps out of slingshot to make place for Vader.)