The entire feel of Yoshi's Woolly World gives off a relaxing and cozy vibe. Part of this wonderful feeling comes from the music. As it turns out, the man responsible for the music, Takashi Tezuka, went through some special training to get the music to work for this game.
Previously, Tezuka did not know how to play the guitar, so he decided to teach himself. After feeling competent enough with his new skills, he went into the studio to create a new song for each level in the game. Talk about dedication!