This game has some really wonderful soundtracks.

I was hoping if GOG could get them added to our game as a game goodie, or as a seperate purchase which would be fine by me too.

The devs will have a soundtrack available when the game is completed. The details on this are still unclear since the soundtrack was a KS backer reward; whether or not it'll be included with game purchase or available on their website for a low price is undecided as of now.