"Spider-Man 2" is a sequel to the 2002 comic book adaption "Spider-Man".
Every once in a while, though it's rare, there is a well-made Hollywood blockbuster that is way better than it tries to be. "Spider-Man" was such a movie. However, it is not so rare that there is a more or less unnecessary sequel, that is not nearly as good as the first volume.
This movie is - kind of sort of. The quality difference is minimal, and the movie is still well-made, feauturing great special effects and continuing the stories the first movie began: friendship, love, action and a subplot of revenge. It is one of the movies that make something big out of only a little, simple bit, making the movie superb and entertaining.
Still, the first movie was better. It had more of the comic book-like athmosphere, more over-the-top fights, simply more enthusiasm.
Also, it feels that Willem Dafoe is missing to this movie. Instead, we got Alfred Molina as Doc Ock, who is memorable, yes, but simply not as great as his preceeder.
In conclusion, it is a worthy sequel, that is far better than most, but after all, is a step behind the original.
There are some fight scenes, but overall, the PG-13 is been necessary. The action is bloodless, and neither disturbing nor too brutal. In the most violent scene, Doc Ock uses his tentacles and destroys a room filled with surgeons, throwing them around (implyingly killing all of them). There is no blood in this scene, and it is not too violent.
It is at the PG end of a PG-13, and should be okay for tweens and up.