private void Move(int x, int y)
{
ScreenNode node = new ScreenNode(x, y);
screen[x, y] = node;
head.prev = node;
head = node;
}
DesignTraditionalSnakeGame(int width, int height, List <int[, ]> food)
{
screen = new ScreenNode[width + 1, height + 1];
len = 0;
foodIdx = 0;
over = false;
head = new ScreenNode(0, 0);
tail = head;
this.food = food;
}
