As a fellow developer, Zuurix explained it to me, Steam tends to burry games, unless they have at least 10 reviews (it's worth to mention that Steam ignores reviews posted by users who recieved the game for free).
Through The Fragmentation has 8 reviews so far - and since the launch wasn't even a week ago, I think the situation is pretty promising right now.
If you've already played and enjoyed the game, please feel free to grab your keyboard and share your thoughts in a review. Of course, constructive criticism is also welcome.