@dasgibtesnet
Interesting analysis! There
is a deeper story (that I'm currently working on) behind it all, and some of the stuff you said is nearly spot-on.
The game in its current form
is supposed to have *just* enough information to piece together a story. For a list of some of the clues, you can check out
a reply I made to Irog's review.
Now, to answer your (more specific) speculation:
>> Is the "hero" the demon lord (he didn't want to go BACK to the castle), or did he kill him?
Given that the main character served in the King's Corps against some threat or another, it's unlikely that he would be the demon lord himself. The player can assume that his division was part of an operation to kill the demon king.
>> Is he simply a overpowered young human that destroyed the economy by slaying the demon lord? I mean... the war with the demon lord is often the only thing keeping those loose alliances together, with that threat gone the humans would easily turn against themselves and to avoid him beeing used he sent him away and made sure to seal his extreme power...?
The game seems to never mention any other countries other than the current kingdom, and so there is currently no evidence of any warring going on between the humans themselves.
>> If we are at that, is the access not authorized to the northern parts, exactly to make sure he doesn't come back?
That thing was actually due to timing constraints-- I didn't have the time to finish any other maps (and thus all the locked doors and closed off areas). If you attempt to access the mountain the "System" stops you-- that is, the game itself-- because that area is incomplete ("area not available").
>> It strikes me weird to employ such a strong guard in a backwater village because he sure as hell wasn't there for the prince (he didn't know he was there) tough that may just have been a plot, saying HE protects the prince while he doesn't know to protect him.... Nevermind that the demon king castle is around the corner so.... it wouldn't be that save.... if any are still alive that is.
The King left the prince there because the King thought the prince would be safe, because if such an OP guard was there surely nothing bad would happen. As the Demon King has already been defeated, the castle is empty and not a threat.
>> What the heck did he do?! Burn the capital with his firestorm doing his job of getting rid of demon spawn that attacked? (If yes than I feel sorry for them...)
That is actually a very good guess. The answer to that is "yes, pretty much something like that". With his OP AOE magic, the main character's bound to have accidentally shot off some "friendly fire" on the battlefield. The intended realization here is that the King, unable to put him to good use in the army, sent him off to some remote town to be a guard.
>> Well I may still get the answer as I still have 3 quests left somwhere but I can't help but wonder since I can't find those three quests...
Some of the quests present in this game are actually just filler quests since this game was made for a contest that had a "10 quests" requirement. If you've already talked to all the people you've likely already seen all the worthwhile quests. The rest are just "you stumbled across a random thing! Quest complete!" kinds of stuff.