I have done that as a temporary delay because if the N key is pressed, all the nukes will be gone in a blink of an eye. Later I will make a better delay function.

I did set the font's size in the scenario, but on Mac, it has a different look. I don't have Greenfoot on a Mac, so I can only guess-and-check font sizes.

Bug was, any number ending with 20 (excluding 20 itself) would have a polygon name starting with "cosa" instead of "icosa."

Well, I watched Tron Legacy and then compared it to the original Tron movie. Though in the original movie, the light cycles did 90 degree turns, in Legacy, the light cycles could move freely.