Jens Bergensten (née Thornell). Jens Bergensten Jens "Jeb" Bergensten is a Swedish video game designer. Since December 2010, he has worked for the video game developer Mojang as a programmer and game designer. He became the lead designer and lead developer of the indie sandbox game "Minecraft", after Markus "Notch" Persson stepped down from his position in December 2011. He is known by his in-game name "jeb_". Bergensten started programming his first games at age 11 using BASIC and Turbo Pascal. By age 21, he was a mapper and modder for the first-person shooter "Quake III Arena". Later he worked as a
SethBling missiles at each other and trying to blow them up". In Missile Wars, players receive items which they can use to spawn missiles, and blow up, stop and defuse incoming missiles. Players can jump on missiles and ride them across the playfield. Cubehamster said that "subtle techniques" involving missile mechanics had made the game popular. According to Cubehamster, Missile Wars was built in two weeks and thoroughly tested afterwards. The game was featured on Minecraft Realms. As a nod to Microsoft's 2014 acquisition of Mojang, SethBling recreated basic functionality of "Minecraft" in Microsoft Excel, which included navigation and crafting. In