i have played some of Arcen games such as a valley without wind 1 & 2 , found the games to be pretty good and excellent music what i do worry about them is their quick jump to sequels .Since both games had some serious fixing that was needed.
from what i recall , they released a valley without wind 2 to implement major changes to the first game , while the first game was pretty new since they gave the second game as free to the owners there was no backlash.
and before you had a chance to explore the new game they already announced another new game and so on.
you can have a look here , its just a slew of one game after another with the earlier games still in their infant stage, requiring major patches and fixes still
http://www.arcengames.com/forums/
steam page for publisher as i mentioned right after a valley without wind 2 , newer games were released barely months apart
http://store.steampowered.com/search/?sort_by=Released&sort_order=DESC&developer=Arcen+Games%2C+LLC#category1=998&developer=Arcen%20Games%2C%20LLC&sort_by=Released&sort_order=DESC&page=1 i can see why gog has their concerns
in short arcen games are pretty fun to play and will have excellent music but they really don't stick with one game before you know it there will be a new announcement about a upcoming game, which means the support and development will switch to the newer game