As Many people have said before in the reviews, the gameplay is very unpolished and rough, but the game simply excels in everything else (music, Voice acting, art direction, writing), everything in this game is beautiful and inspired.
Crystar its a very emotional and personal Journey with a small cast of characters, It that doesn't try to be a grandiose hero's Journey but a contained game that wants to tell the story of a small set of characters that want to confront their own traumas in whatever way they feel is best, intersecting the main cast paths not with a common goal in mind, but with a common ground, searching for resolutions to their wounds while building a gripping and satisfying plot.

Crystar it is a game rife with philosophical and literary references that help strengthen some its messages across, but is not necessary to be a very well read person to get all of the game wants to convey and the entire work is very cohesive and easy to follow.