Minecraft led to Persson becoming one of "Forbes" "World's Billionaires". "Minecraft"s music and sound effects were produced by German musician Daniel Rosenfeld, better known as C418. The background music in "Minecraft" is instrumental ambient music. On 4 March 2011, Rosenfeld released a soundtrack, titled "Minecraft – Volume Alpha"; it includes most of the tracks featured in "Minecraft", as well as other music not featured in the game. The video game blog Kotaku chose the music in "Minecraft" as one of the best video game soundtracks of 2011. On 9 November 2013, Rosenfeld released the second official soundtrack, titled "Minecraft – Volume
Sticky (Swedish company) Sticky (Swedish company) Sticky is a technology company that has developed a platform for webcam-based eye tracking making the benefits of eye tracking accessible on the internet and providing brand advertisers with objective data for optimization of digital branding performances. Sticky was founded in 2010 by Mathias Plank as a spin-off from Tobii Technology and is today led by CEO Hans Lee. <br>In May 2012, Northzone Ventures invested $3 million in the company. In April 2013, the company raised an additional $3 million in venture capital from Northzone and Conor Venture partners Sticky has offices in San Francisco, New York