All that's good about this game has already been said.
Points of Improvement:
-more varied battle soundtracks, It's the same problem I had with Final Fantasy 10. I end up getting sick of the soundtrack after a while due to the dozens upon dozens of battles you get into. Music that changes depending on setting would be a great addition. As a side note, sound effects for some of the spells and attacks would be nice as well.
-Although I respect the attempt it'd be nice to find someone to make the portrait art more professional.
my tips are all nitpicky because the core gameplay is fine and I have nothing bad to say about it x) very fun game.