This is a really great example of how to match story with gameplay. Everything meshes together so nicely, and even though there are no words on the cards they really get across the idea of navigating your way through a conversation a lot better than the charisma/speechcraft systems in most RPGs that involve that kind of stat.
I'd love to see a Linux version of this if you ever find you can spare the time and effort to produce one, but I played through the whole thing using WINE and didn't run into any problems at all.