Ok @600MHZ and without changing any settings that can improve performance


-Mugen: very laggy and low framerate, it seems like it's because of the music playing, when it stops playing it runs better. @805MHZ runs full speed with some lags here every minute or so
-Adventure Mode: works better than mugen mode, didn't lag that much or at all. Should be fast @805MHZ
-Platformer Mode: Just the mario background from my screenshot shows, and that's it, so either it doesn't work or I need to add some mods myself for it to work