public override void _PhysicsProcess()

in scripts/Enemy.cs [24:31]


    public override void _PhysicsProcess(double delta)
    {
        Position = Position with
        {
            // don't leave the play field
            Y = Math.Clamp(Position.Lerp(follow.Position, difficulty / 10).Y, 16, GetViewportRect().Size.Y - 16) 
        };
    }