[dissident93]

Originally Posted by Can of Nothing

I'm not entirely convinced Koji Kondo did the Super Mario Maker Title Screen theme.
Has there been any official confirmation that it's a solo score, like Ocarina of Time? The only thing I've heard was the announcement his position as "lead composer" back during The Game Awards, and ever since it's seemed like people have somehow spun that as though it meant he's the only one doing anything for it.

At any rate, it's not confirmed yet, and I don't think it's a very good idea to assume he did until it's confirmed, like how songs like the Super Mario 3D Land Ground Theme is 'credited' at the moment.
Ground BGM (New Super Mario Bros.) is probably the Overworld theme Kondo wrote, taking into account naming conventions.

I'm rather disappointed there's just one song from Super Mario Maker in this, though. Hopefully there'll be a more proper release of the music sometime soon.

He stated in various interviews in December that he was the sole guy doing audio for the game.