The Title theme is inspiring and soothing at the same time, and together with the graphics it made me want to play such a game :) like it very much, also love the strings and overall orchestration and instruments.
Battle theme is a wow for me in the way how varied it is, great job.
Exploration theme is lovely and calming, and the Credits theme's melody is so nice and reminds me of music from Makoto Shinkai's movies :)
I also like the leitmotif being noticeable in the tracks, and overall how they compliment each other. Great soundtrack!