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",
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.