I like your game very much; I haven't enjoyed anything as much in a long time. It's a great story that will entertain anyone who aches for a game like the Mother games produced.
That said, mechanics-wise I felt a little underchallenged, even on the highest difficulty. The damage adjustments are too minimal for a seasoned roleplayer, and I had to force myself to use my health items because I never felt in danger of losing. Additionally, I had hoped that on the highest difficulty, status ailments would linger after battle.
All that being as it is, I still had a lot of fun with this game, and am currently on an Achievement run on Steam.