this is one of the things everybody needs and it is like inventing the wheel every day:
startcountdown and pause.
i have made a scene that can be startet once in your game as an overlay scene. at the start it will suspend the main scene (give it the name "game or change “game” in the logic bricks of the start pause scene to the name of your main scene) and the hud scene (same here) and after an onscreencountdown from 3 it will start both scenes. whenever you push p it will suspend both scenes and will restart them after pressing p another time.
feel free to use this in your games at your own will. no restrictions. you dont have to mention me, but you can
load it down from here: