Into the Death Star | Story Mode - Episode VI LEGO Star Wars 2 Guide

First you are to destroy 4 star destroyers (hey, nothing's too hard for you). You'll do that by shooting torpedoes at violet spheres near their bridges. You'll get some torpedoes by shooting down TIE Bombers flying around.

The next section takes place inside the Death Star. Gather torpedoes from the dispensers and use it to destroy the blockades and shield generators. Shoot all the time, destroying all the scaffolds and turrets for studs. When you're in the core room, destroy the panels on the walls. They open when you approach them - don't get too close, though, or you'll get electrocuted. When you destroy them all, the core's shield will go down. Shoot it a few times (you have to squeeze your lasers between the rotating metal barriers), and finally shoot a torpedo in it.

All that's left is to get the heck out of here - just keep flying and shooting, destroying everything that stands in your way. You shouldn't have any problems managing to escape.