Curiosity: What's Inside the Cube?

I am currently part of a social experiment. Along with over 900,000 other people I am chipping away at a humongous cube made of billions of cubelets to try and reach the centre (where something life changing awaits one lucky person). The app is on iOS and Android to download for free, however, there have been,and still are, a lot of bugs such as coins being deleted. For more information on this fascinating experiment you should take a look at the Wikipedia article.

The picture is how the cube looked a few minutes before this post.