It's also made from layer and events. I'm not an expert of lua scripting anyway.
Added in 3 hours 39 minutes 41 seconds:
Re: -Dudboi2005's Level Mall-
New level of April! This level is pretty much a focus of the gimmick of the Carryable Pipes (lua script created by MrDoubleA), and the death system is different in this level since you get transported to the start or the checkpoint after dying (rooms lua script also created by MrDoubleA). This level is compatible for SMBX2 Beta 4.
-Created on 4/26/20-