Yeah, the game started up now, so after I play a bit I'll edit with some feedback.
EDIT:
First off, I like the start of the game, how you put the player into a cool mission, and then later explaining what was happening, it's a cool way to tell a story. The first fight, with the Demon, I at first thought it was one of those fights where you were supposed to die, so I did (lol). So I played again, everyone but the shield man died once, it shows me how difficult this game may become, which can be good and bad, as 3 deaths is pretty strange for the opening boss (unless I'm missing some sort of tactic in gameplay). To comment on your mapping, it is pretty plain, especially the town. Speaking of the town, not only is it blank and lifeless (no citizens) but you can only enter one building (everything else was 'Locked.', which makes the player feel pretty trapped and given a straight forward route to how they want and can play the game. I also didn't understand why your party members starting at different levels, I'd expect them all to be of the same amount of experience since they seem to all know each other and are mercenaries and what not. You should also think about adding in some of those cool lighting and fog effects so that specific places have a specific feel and mood to them. When I entered the demon's tent, the tint of the screen and the overall feel of the location was pretty much the same as when I was outside. Characters aren't the only ones that deserve a bit of personality.
So, work on your mapping, make the game a bit more lively, forget about the difficulty factor that I had mentioned because it may not be the same for anyone else.