Pretty good
Pros: The concept was funny. I liked how you interpreted Darth Vader's character. I loved the ending. The animation was good.
Cons: A lot of the dialogue was hard to understand. This movie could've been made accessible to a wider audience if you just cut the statement short at "sucks". The stormtroopers' armor looks too big in the, um... pelvis region. It's a bit odd-looking. Also, if you're actually going by Star Wars canon, I'm pretty sure that the empire didn't have any storm trooper clones by that period in time. I liked how Darth Vader tried to sing a little something to the Imperial March theme, but the melody didn't come out enough to really drive the joke home.