My favorite puzzle game ever. The music and art create a nice atmosphere and the story makes you want to keep playing!
The object of the game is to find all the creatures associated with each side of Pandora's box. There are cut-scenes telling about the legend of each creature. Once you find one, there is another cut-scene telling the conclusion of that story.
As you progress through the story you will travel to different areas in the world. Each location has music and art that you'd be likely to hear/see if you actually visited. At the end of each stage you'll have a "boss puzzle" which is given to you by the creature you were searching for.
All around, the game is just awesome.