Since I already had the Kee 4-speed shifter, my plan was to just add a control panel to Super Bug with flashing start light and working shifter. However, as I researched the game, I found some additions could be made to other parts of the artwork. Watching blinddog's video, I saw there are supposed to be green overlays at the top and bottom of the screen, and the yellow overlay is actually "starburst" shaped so it looks like an explosion when you crash.
Also, looking at what few photos are available on the web, it seems that the bezel should have lime green and purplish stripes rather than yellow and red, although it's possible there was more than one color scheme released.