Just something I felt I should point out - the name at the top left corner of the message box needs something to help make it stand out. It's the same size and font as the text (which is pretty small) and is thus fairly easy to miss. Especially if placed against a bright background, like snow or sky. Also, the words cover up the corner of the message box. Some people mightn't care much about it, but personally I feel it detracts from the aesthetics of the message box.
Another thing, there's a typographical error on the message displayed inside your second screenshot - you forgot to capitalize the first word of the sentence. Of course, for all I know, it could be the continuation of an earlier sentence - but if that were the case, I'd still put something like an ellipsis (triple dots) to mark it out.
As for the 1000-Years debate which seems to be taking place, it is indeed perhaps too much of a coincidence that a major event occured exactly 1000.000000001 years ago, unless the date has some sort of direct spiritual, religious or otherwise supernatural significance (I'd say scientific as well, but I think it's pretty obvious there's going to be little of that stuff here). But since that's sort of unlikely, what's more probable is that whatever event happened, occured close to 1000 years ago and was rounded down simply because the speakers were lazy. In fact, that's probably what happened, seeing as it's listed in Kale's profile as "over 1000 years ago". It's not hard to note that in nearly every fantasy, years are always rounded to a nice, pretty number ending with a zero or five, unless they're a one digit number. Of course, it might not always be that pretty a number in actuality.
As already stated by some people, having a cliched backstory does not always make for a bad game. It IS quite possible to pull it off, but not easy, since it's already been explored in many different ways. So if you want to excel the game in Story as well as Gameplay, it's probably going to be a hard job. The end Story result of this project will reflect your creativity and intellect plus all the work you put in. The same goes for all games and their respective creators, but will be more obvious here, simply because a large percentage of players will already have prior knowledge of this type of story and all the twists it can take - this is just something you should keep in mind.
To make it clear, I am in no way attempting to deter you from continuing this project.