That is a great idea, and yes it was a basic Snake type clone or Wrap Trap. I am 100% certain of the name "Chicken Out" (I have disks that borrowed some of the code to make multi-file directories boot automatically and can relist the menu by typing RUN"D:CHICKEN.OUT") and can describe it: It used the blue screen like when you boot an XL, with various colors to represent your character movement. One color was even the basic white like text. As you move, it made a repeated sound similar to holding down any character key in basic but slightly different pitch. It changed to a low buzz when you crashed into a wall of the trail left behind by you or your opponent. Three hits and it made a high pitched musical tone to indicate the game round ended.
The game IS listed on Atarimania but with no ROM dump/atr etc.