There's been recent concern about the messaging around in-app purchases in similar free-to-play games, which has led the European Commission to strongly recommend that apps built on the business model no longer call themselves 'free'. Google's App Store has changed its policies to fall in line with the new rules. While Apple hasn't followed suit, the company behind the iPhone and iPad has intervened in the past when kids have unwittingly made large in-app purchases. We've reached out to representatives for Machine Zone, the company that makes Game of War: Fire Age and will update this post if we hear back.
This would be one of the more interesting science projects by a 13-year old, but its not good science and it isn't a breakthrough. Only saying this for the still-naive commenters: the kid was creative, but he wasn't right. Measuring voltage is not how you measure the power output of a solar array, for one thing. But mainly, orienting the cells in patterned or random directions will never generate more power than aiming them right at the light source. should pull the story, since its been exposed long ago as hype and bad science that made it to meme level.