Sadly, after much deliberation, your map has been denied.
The map felt very disjointed from the start, and it felt like I was playing three separate maps. The initial mario section, the mushroom section, and the corridor of stone section. One of the biggest issues is a lack of detail. The mushroom area is fine, but the underground section, as well as the walls of the stone section are lacking. If you are meant to be inside of a castle, why are there no stone bricks to show this? Why is it made out of stone completely.
However, I hope to see other maps from you in the future.
~ Billy