Thanks!
Here's a tip:
Click the plus button to erase
And click the x button to get rid of the erase feature .
It's not permanently gone tho!
No prob!
When you save a file, it will be called (level name).mlws.
Load it, and you can play test it!
(in the home menu only tho)
Here are examples of the file format
Btw
Oops!!
The world editor does exist and is accessible, however, you can't place stuff(I lost the decompile to the "Mario worker" game)