Minecraft of the alpha version of the game expanded. Persson continued to update the game with releases distributed to users automatically. These updates included new items, new blocks, new mobs, survival mode, and changes to the game's behavior (e.g. how water flows). To back the development of "Minecraft", Persson set up a video game company, Mojang, with the money earned from the game. On 11 December 2010, Persson announced that "Minecraft" was entering its beta testing phase on 20 December 2010. He further stated that bug fixes and all updates leading up to and including the release would still be free.
Minecraft mods the Bukkit add-on to work on an official modding API, allowing mod developers easier access to the "Minecraft" game files. In May 2015, Mojang announced on social media that they were "still working" on this API, despite announcing it over three years ago. Concern arose following Microsoft's acquisition of Mojang in late 2014. Members of the modding community feared that "Minecraft"s new American owners would put an end to Mojang's established practice of giving free rein to mod developers. Despite the concerns, Microsoft has not announced any changes to Mojang's policies. In April 2015, Microsoft announced that it was adding