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
Minecraft "FortressCraft", "Terraria", and "Total Miner". David Frampton, designer of "The Blockheads", reported that one failure of his 2D game was the "low resolution pixel art" that too closely resembled the art in "Minecraft" which resulted in "some resistance" from fans. A homebrew adaptation of the alpha version of "Minecraft" for the Nintendo DS, titled "DScraft", has been released; it has been noted for its similarity to the original game considering the technical limitations of the system. In response to Microsoft's acquisition of Mojang and their "Minecraft" IP, various developers announced even further clone titles that were being developed specifically for