スーパーマリオギャラクシー
After Nintendo completed "Super Mario Galaxy", Shigeru Miyamoto approached the development team and suggested that a follow-up be produced. The game was originally planned to just do variations on the original game's planets and call the game "Super Mario Galaxy More", and was dubbed "Super Mario Galaxy 1.5" during early development, with a projected development time of approximately a year. The first elements that were implemented were anything that was scrapped from the original game, either to ensure game balance or simply because of time constraints, such as Yoshi and the concept of a planet shaped like Mario's head. Over time, more and more new elements and ideas were brought into the game, and it was decided that the game would be a fleshed-out sequel rather than a slightly modified follow-up. Thus, development took two and a half years. Takeshi Hayakawa, the lead programmer for "Super Mario Galaxy 2", created a development tool that allowed different staff members, including visual and sound designers, to easily design and create stages without waiting for programmers, many of which were incorporated into the final game.