Have you consider adding a map or the ability to backtrack?, i tend to get lost pretty easily and sometimes feel like i am leaving things behind.
Also in the mercenary guild i think it was?, during chapter 2 there is a crystal that prevents you from using your powers inside the building, is it possible to access the room to dispel its magic?, there were plenty of NPCs there to level up.
Overall it is a pretty interesting game and i would personally put it in the higher end of free indie games.