To get 5 stars you need to play on the hardest difficulty, beat all the secondary missions in the level, beat the level under a certain amount of time and do it without LOADING a save. You can save as many times as you want but you cannot load the game so you have to do it in one run.
I make quicksaves at the end of the level so if I screw up a level I load that save and do the last bit of the level before it and then try the next level again.
I include some of the dialogue but sometimes, like in the tutorial level, they just randomly decide to stop talking or not talk at all.
