ET3D: That's the kind of thing that's a little hard to know in advance. I typically assume that a game will work as I expect it, if that expectation seems reasonable. In fact, it probably does. I just got alarmed because there were no options in the game, and it had the launcher which also didn't have configuration options (and I expect a game with a launcher to have that there, if it's not in the game).
Please don't take this the wrong way, but I'm a bit baffled by your responses. While I appreciate feedback and do like to help a follow gamer out with their game, I hope you do realize that I neither work for GOG nor some other gaming service, but am only a private person that gifted a few games to follow gamers out of kindness. I don't provide any service or give refunds, etc.
I do hope you'll be happy with the game in the end, after all you got a 30 Euro game for free, which seems like a quite nice thing to me.