Challenge saying code can't be compiled; no errors in X-CODE or preview

class Point {
    var x: Int
    var y: Int

    init(x: Int, y: Int){
        self.x = x
        self.y = y
    }
}



class Machine {
    var location: Point

    init() {
        self.location = Point(x: 0, y: 0)

    }

        func move(direction: String) {
            print("Do nothing! Im a machine!")

    }
    }

    class Robot: Machine {
        var moveDirection: String
        init(moveDirection: String) {
            self.moveDirection = moveDirection
            super.init()
        }
       override func move(moveDirection: String) {
        switch moveDirection {
            case "Up": print("The robot moved up one y coordinate")
            location.y += 1
            case "Down": print("The robot moved down one y coordinate")
            location.y -= 1
            case "Right": print("The robot gained one x coordinate")
            location.x += 1
            case "Left": print("The robot lost one x cordinate")
            location.x -= 1
        default: print("Machines don't move like that...")

        }
        }


}

let somethignOrAnother = Robot(moveDirection: "Up")