Super Mario Bros, by offering players an open world to explore, puzzles to solve and a fantasy story that centres on a protagonist embarking on an adventure to save a princess from an evil villain and bring peace to Hyrule. The new game concept caused concern with Nintendo's management. In 2003, Miyamoto stated in an interview for Superplay magazine: "I remember that we were very nervous, because The Legend Of Zelda was our first game that forced the players to think about what they should do next. We were afraid that gamers would become bored and stressed by the new concept". During the testing phase, players complained about getting lost inside the game's dungeons, but rather than making the game more simplistic, Miyamoto decided to make it more challenging by removing Link's sword at the beginning of the game and forcing players to locate it. He wanted to encourage players to communicate with each other while solving the game's puzzles. Transition to 3D Hyrule continued to evolve over the course of successive games. The transition from a 2D to 3D world occurred with the release of Ocarina of Time, due to the capabilities of the Nintendo 64, which gave players the opportunity to experience a more realistic game environment. The 3D world was also accompanied by an expanding fictional lore that laid the foundation for other games in the series within an official fictional timeline. The game's dungeons were each unique and connected to a specific area of Hyrule and its inhabitants. Several recurring races, such as the Gorons, Zora and Gerudo were introduced and given a distinct history and culture. Hyrule Field, an expansive open grassy area, was positioned at the centre of Hyrule, acting as a hub that connects other areas to create the illusion of a vast world. The game's time travel mechanic also introduced a dark version of Hyrule Kingdom, a land corrupted by Ganondorf's influence, with Hyrule Castle Town in ruins and Redead zombies as its inhabitants. Due to concerns about the limitations of the Nintendo 64, Miyamoto initially conceived the game taking place within a central hub in the confines of Ganon's Castle, similar to Peach's Castle in Super Mario 64. He described Ocarina of Time as a "huge project" due to the fact that it involved making the game environment from 3D polygons and was larger in scale than anything that he had