Not even sure this works but oh well.
Start a new game. Might even need to reset after the meteor crashes. Then load the save game (should say Level 1) and then
just walk around. Main stuff is at the top left corner of the world. Mr. Saturn will take you there quicker.

Needs to be patched to an expanded ROM, BTW. I made the patch with JHack, but I dunno if that did any extra stuff to the data.

-MATO