The final touches on the arcade box includes making the sign that goes over the top of the box and cutting the flaps of the box to frame what makes the screen of the arcade. Using a printer I printed the image below, and then glued it to the top flap of the box. You can order a copy of this picture at my DA art gallery at http://darkrubymoon.deviantart.com/art/Space-Alien-Invasion-203352400
Paint the flaps as necessary, preferably using bright fluorescent colors.
Cut the side flaps of the box to be about 1 1/2 inch wide. Use two brads along the corners of the top flap to hold the top flap down and the side flaps in to create a sort-of frame for the screen of the arcade box. I cut a hole for the reset button to come through on the front bottom right of the box. The bottom flap requires cutting a slot that is about 1/2 inch wide that runs almost the entire length of the bottom flap near the fold. This is where the arm will pass through that holds the gun you will mount on the arcade. To add additional support, I glued two scrap pieces of cardboard along the bottom edge of this cut. That will ensure the arm of the turret gun will slide easily back and forth.