How those "games" came into existence in a nutshell: Buy some cheap game assets, throw them into a 3D Engine, compile something and call it "early access" - Then never ever touch it again and watch the money flow in. Ten bucks for this mountain of crap seems a lot, but imagine the amount of frustration you get for that money. There is a ton of "developers" on steam that follow exactly this way of "get rich quick"-scheme. Now they arrived on GOG as well. To offer customers something like that is a disgrace and it shows how little GOG nowadays cares about their customers.
I would love to write about the graphics, which are great. I would love to write about the game mechanics, which are really good. But, alas, I was only able to get through a very short piece of the game because on Linux it crashes like the shores of river Styx. According to the forum, the Linux port seems to be broken in version 1.3... Well. No use for great graphics or game mechanics then.