Out of interest, was the issue with the arrow that the pointer was static? That screwed me up early on in using Greenfoot - when you press reset, it doesn't reset the static variables, unless you specifically do it in a constructor/method. Then again, its quite useful for session high scores (without use of UserInfo, which I still haven't got round to ever using)

@Duta, I cannot be sure. It was too long ago. This was like my 3rd project in Greenfoot. I am not sure if I was using static variables at that point. However, I noticed I had said that it compiled different each time; which indicates that it was probably something else.