OK,you can say that the game has perfect graphics and great gameplay, don`t you think its a little short.
The second part is against baron.That is a great part where you can smash everything around. nothing much to say about this level except for the last level where you got a nice giant boss which is pretty hard to kill.The first teaser trailer was made for this part.
The third part is on a battleship named Salvation,where you get the first hard parts of the game.There,the objective is to get to the bridge and smash the carouser into Kamino shield. There you will find a boss,but it would be a SPOILER to tell anything about it.
And the last part is on the platforms of Kamino. You have to fight very large amount of stormtroopers,but nothing mere to say about it,except that the boss of this level is Vader himself,along with 20 clones of Starkiller.
Well at the end of this it is a truly a great game that is a must-have for every Star Wars fan.