Minecraft in his performances. A simulation of the game was featured in Lady Gaga's "G.U.Y." music video. The game is also referenced heavily in "Informative Murder Porn", the second episode of the seventeenth season of the animated television series "South Park". "Luca$", the seventeenth episode of the 25th season of the animated sitcom "The Simpsons" was inspired by "Minecraft"; Persson responded by tweeting "I'm not sure how I feel about it." After the release of "Minecraft", some video games were released with various similarities with "Minecraft", and some were called "clones" of the game. Examples include "Ace of Spades", "CastleMiner", "CraftWorld",
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