Bro i am having the same problems with the new super mario bros I AM USING nogba plus nzoomer when you go to world 1a the underwater level and the graphics are all black but can still see yourseft and everything else Dude load the emulater up and go to the other options screen once your there scroll down to when you see EXTRA OPTIONS start ticking the boxes from extra 0 to extra 4 don't select extra 5 because it will slow the emulater down so that's what i did and it worked same as those other water stages too hope this information helps dude