My Take
The initial goal of this program, that is to translate wikipedia in other languages, is of course very admirable. However, the approach to language teaching is a bit sloppy. The game does not provide explantations for grammatical structures which means that the user might enter the correct answer to a question based on the wrong presuppositions. This will only become evident in a later stage when the grammatical structures become more complex in nature. Therefor, I think that this program is a good aid for drilling pre-taught structures, but not as the primary source of instruction for actual beginners.
How I Use It
I suggested it to students who were lagging behind, as a motivational tool rather than a serious form of instruction.