(Cancelled) Super Mario Story 1-Castle

This is the unfinished world 1 castle from Mario Story. The castle was meant to be split up into three main sections. The player starts outside of the castle after which they are presented with 2 separate pipes at the midway, the main castle interior or the castle's basement, which wasn't completed. The 2 paths then would have converged and the final section would have seen them climbing one of the castle's towers up to the boss fight. it's a cool concept that I haven't really seen in 2D Mario outside of something like Endless Earth.