Important part in an electronic project is creating an enclosure for the parts. Without it, it is simply not finished. Luckily we now have 3D design software and 3D printers which are perfectly suited for the job.
Playing games on emulators is usually bound to using arrow keys on the computer keyboard or an analog PC joypad. This ruins all the fun. The right way to do this is of course using a real arcade joystick.