They're SMB3 styled levels, hence the name. Like SMB3, they're rather short, but make up for it by having no checkpoints.
This is a demo, it contains the 1st whole world, but, some features are missing since I don't understand to do what. I'll lists those at the end.
This demo pack has the following:
-8 Levels
-1 world
-One bonus level
Screenshots:









(This is the bonus level)
Overall, these levels are rather easy, since I wanted to make the 1st world easy, then keep getting harder. So you shouldn't have any unfair moments unless it's broken design.
The game will be included as a ZIP attachment below, since the file is small due to everything being stock assets from SMBX (I don't know how to make custom graphics/music yet)
Notes:
-The pipe towards the 1st Boom-Boom shouldn't be there, I want to make the wall close down to no return when Boom Boom appears on-screen, but I don't know how. So I used a 1-way pipe instead, looks kinda sloppy.
-The airship boss should be a Koopa kid, but I don't know how to make a trigger so that the level ends when they die. So I used a Boom-Boom as a temporary replacement.
I hope you enjoy. I also hope that my 1st levels weren't too sloppy and unenjoyable.