I strongly recommend to buy an x360 controller for Windows. I beat the game on Sith Master with it and it was at least 10 times easier.
Other than that try to make the Star Destroyer pointing exactly at you and ignore the arrows until they change to the S+down combination.
"I've barely eaten anything for many decades now. It feels like my stomach shriveled into my back........though i don't have a stomach or back because i'm a skeleton! Yohohohoho! SKULL JOKE!"
"My eyes have never seen such a pretty woman! But i'm a skeleton so my eyes don't see much."