A game based on a movie is seldom good, but Shrek 2 is actually quite a fun game when you've got nothing better to do!
In the game you simply follow the storyline of the movie with the same name as the game ("Shrek 2") with a few extra forest scenes like in all from-movie-to games. The original voice actors from the movie has returned and made new, original soundtrack for the game, but as it just repeats over and over it gets very annoying. And the quality of the graphics don't really help.
Play Shrek 2 only if you find it when you're bored, don't actually buy it.