On emulator 1 player mode doesnt start on smb1 and 3!
If you're not using a brand new save file, it will keep the player mode it was started with. Either pick a "new" file or delete one and you should be able to select it.
no, i am starting new game, unplayed and it doesnt work at all. mario 2, lost levels, and world work but 1, and 3 dont
Recente runs
