Delightful soundtrack, it reminded me a bit of a Joe Hisashi score from Studio Ghibli. It starts off light and whimsical and slowly tension is increased and it becomes much darker. By the time it reaches the ending theme, it returns to a more melancholic version of the main theme, and then builds into a full orchestral finale. Good use of leitmotifs and reharmonization to reference and build upon earlier tracks.
Mixing wise some sections are a little too wide, which is can cause problems on mono speakers. Orchestral libraries can be pretty wide out of the box so it's good to use something like Voxengo's Correlometer to monitor it, especially for lower frequencies.