While the project is based upon a gaming engine, and is "set up" as a classical game, the whole intention of the project differs totally from what is widely found as the "definition of gaming". (which is: having fun by pushing buttons to move dumb objects on a screen)
The basic concept here is to use a computer game as a media or communication platform, to use it educationally - and to use it to make people remember the BAD things that happened in history.
And you know, it works. People here in germany did not discuss the Mauer shootings for several years on such a broad base for years, and now it's all over public media again - which is basically even MORE than the author of the work could have hoped to gain with it, but it was exactly what was on his mind - maybe on a smaller scale.
In general, it's time that public opinion recognizes games as more than "a funnny thing to relax". It's an art form, it's about communication, socializing, and live in general. The understanding of a "game concept" finally has to change, but I think this will come with the next generations, who understand a "computer game" not only as an evolved version of "Pong".