Sednaiur wrote:You can work around that problem.
First you need to put a level (that looks like the path-GFX you are using) bitween the actual first level (that is 1 - 1 for example) and the level, that is meant to start your episode (like mario's house). Then you tag it as "start level", so you will start on that level, which opens the path to the real startlevel (marios house) and the first level (level 1 - 1). This makes it able to hide a secret in the first levels (marios house and level 1 - 1), without getting them opened automatically by SMBX.
Sorry if i explained it bad, but i really don't know, how to explain that better. But for an example, you could check out the worldmap of my project in the editor for that trick.
I think I understand what you're saying. Put a "START" space before Mario's House?
EDIT: Since it's the final battle (which leads to the credits), is it actually possible at all to have an exit from the level? I do make the player collect an SMB2 boss ball thing but I'm not sure if it's possible to unlock anything after that.