miniGameCanDamage(%obj,%obj2) returns 1 or 0. Depending on whether they can damage eachother.
what you want to do it
package iHatesnake
{
   function miniGameCanDamage(%obj1,%obj2)
   {
      if($killAll)
         return 1;
      else
         return parent::miniGameCanDamage(%obj1,%obj2);
   }
};activatepackage(iHatesnake);