 Development for Lost World started shortly after Sonic Colors was finished and took place over two @-@ and @-@ a @-@ half years . Sonic Team sought to streamline the controls , increase the length , and add more diverse levels compared to previous entries in the series . After reviewing the history of the franchise with Sonic Generations , game producer Takashi Iizuka hoped to " deliver a new experience " with Lost World . Development started on PC , with early experiments involving " twisted tube @-@ type level [ s ] " inspired by Jack and the Beanstalk . As the concept " was totally new " , early levels had to be remade " over and over . " Players were given greater ability to control Sonic 's speed in an effort to create a more traditional platforming experience . The parkour mechanic was introduced to maintain a more fluid sense of movement , in contrast to previous Sonic games where running into a wall would force the player to a complete stop . Iizuka stated that " This game is like going into the rabbit hole in Alice in Wonderland , an action game where you can experience many strange and fun experiences . " 
