One thing I noticed (playing as a fighter) is that the screen tint for the rage is a little much. Getting poisoned or taking moderate damage completely blinds you while the rage is going. And speaking of poison, while I was in the swamp map of the chuxen area, I noticed that I was getting poisoned randomly. Is that because of the green slime flat or some kind of residue from the stalkers?
Also, maybe add some kind of sound for when you gain a level.