Mojang 2012, Mojang was co-developing a video game codenamed "Rex Kwon Do" alongside an undisclosed developer. Before the title had reached a significant stage of development, Mojang cancelled the collaboration, due to their lack of involvement and influence on the project. In March 2012, Persson revealed that he would be designing a space sandbox game. Although Mojang teased with an April Fools' Day website based around "Mars Effect" (citing the Bethesda lawsuit), it was confirmed that the game was indeed in development, albeit with a different name. On 4 April, Mojang revealed the game's title to be "0x10", set in the
Minecraft 2 Player Productions. In 2014, an attempt to crowdfund a fan film through Kickstarter was shut down after Persson refused to let the filmmakers use the license. A Lego set based on "Minecraft" called Lego "Minecraft" was released on 6 June 2012. The set, called "Micro World", centres around the game's default player character and a creeper. Mojang submitted the concept of "Minecraft" merchandise to Lego in December 2011 for the Lego Cuusoo program, from which it quickly received 10,000 votes by users, prompting Lego to review the concept. Lego Cuusoo approved the concept in January 2012 and began developing