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
Mojang year 281,474,976,712,644 AD of a parallel universe. In April 2013, Persson announced that the game was shelved, due to a creative block. In August of that year, he claimed that the game was indefinitely postponed, with the incentive that other Mojang staff members could continue its production should they desire. In September 2012, Mojang began the "Block by Block" charity project in cooperation with UN-Habitat to create and design real-world environments in "Minecraft". The project allows young people who live in those environments to participate in designing the changes they would like to see and involve them in urban planning.