For people on Android first you're going to need retro Arch after you got it from their website do not use the Play store version it is old and outdated I recommend you use the web browser version and then after that just look at the first recommended one and then after retro Arch get started extracting it's files make sure you get a NES emulator that will work and then make sure you have the ROM for it of this one and then connect your controller and enjoy for PC users you can just follow the same thing