It’s no secret that 2D Mario games, such as New Super Mario Bros. Wii, sell significantly better than 3D Mario games, including the critically acclaimed duo – Super Mario Galaxy and Super Mario Galaxy 2.
There’s no definitive reason for as to why this happens; however, New Super Mario Bros. U Director Masataka Takemoto says he thinks that, compared to the simple controls in 2D games, most people tend to be less comfortable with 3D controls and, therefore, prefer 2D Mario games over 3D Mario games.
“I don’t think it’s because one game is better than the other. It’s just that compared to 2D, there seems to be more people who are not as comfortable with 3D controls. And maybe a wider range of people were more accepting of the New Super Mario Bros. series, which may have seemed simpler to them.”