let scoreLabel:SKLabelNode = SKLabelNode(fontNamed: "Arial")
scoreLabel.fontSize = 90.0
scoreLabel.fontColor = SKColor.whiteColor()
scoreLabel.name = "score"
scoreLabel.text = "Score: (monstersDestroyed)"
scoreLabel.verticalAlignmentMode = .Top
scoreLabel.horizontalAlignmentMode = .Right
scoreLabel.position = CGPoint(x: frame.size.width, y: fram.size.height)
self.addChild(scoreLabel)