The levels that I come to share are the following:
Aerial Land (for SMBX 1.4.5):
Welcome to Aerial Land. Here you will find a large biodiversity from the Mushroom Kingdom. The route of this place will take you to the top in the skies and having an excellent hike from the surface of the clouds. There have been many incidents since it opened to the public, leading to cause falls of more than 8000m to strong wind currents that push people. There is even a legend that a giant Pidgit lives at the end of the tour which has already claimed several victims.
Screenshot:

Link to download the level: https://mega.nz/file/JklyULaB#TfZJBGlDv ... UXXYZFGc8o
Crossover Challenge (for SMBX 2.0):
The level consists of collecting four red coins to complete it. These coins are distributed in four sections, each inspired by a franchise game from Super Mario Bros to Super Mario World. For each coin collected, a switch will appear, which must be pressed to release a key that will open the section where the star is located. But be careful, because from the moment you pick up the key something will be chasing you.
Screenshot:

Link to download the level: https://mega.nz/file/g4VExT7J#YVxgT_yPH ... re5Y_tgfwM
Hope you enjoy them and I await your comments.