A video game developed by a 14-year-old has just claimed the number one spot in Apple's Free App store.

Robert Nay, an eighth grader in Spanish Fork, Utah, created Bubble Ball.

After being available for only one day, Nay's game received more than 400,000 downloads, knocking the game Angry Birds from the top of the app charts.

"My friend's dad suggested I make an iPhone app and I thought, 'Why not?' That would be pretty cool," Nay said. "And so I checked a book out from library and I eventually found a program called Corona SDK. It has a built in physics engine which is really nice."

Nay is hard at work creating his second game. He plans to charge at least 99 cents per download for this one.

If he had done the same for Bubble Ball, it has been estimated that he would have made more than $2 million on all of the downloads of the game so far.