I just completed Pauls book Hacking with macOS up to Bubble Trouble (Swift UI addition). On the challenges I was able to find a solution to place "Game Over!" on the screen when all the bubbles are gone as expected. But expected the text to be blue as thats what I coded... Text remains white... Any clues to why this doesn't work? Heres a portion of the code:

  func pop(_ node: SKSpriteNode) {
        guard let index = bubbles.firstIndex(of: node) else { return }
        bubbles.remove(at: index)

        node.physicsBody = nil
        node.name = nil

        let fadeOut = SKAction.fadeOut(withDuration: 0.3)
        let scaleUp = SKAction.scale(by: 1.5, duration: 0.3)
        let group = SKAction.group([fadeOut, scaleUp])

        let sequence = SKAction.sequence([group, SKAction.removeFromParent()])
        node.run(sequence)

        run(SKAction.playSoundFileNamed("pop.wav", waitForCompletion: false))

        if bubbles.count == 0 {
            endGame = SKLabelNode(fontNamed: "Marker-Felt")
            endGame.color = NSColor.blue
            endGame.text = "Game Over!"
            endGame.fontSize = 128
            endGame.position = CGPoint(x: 400, y: 300)
            addChild(endGame)

            bubbleTimer?.invalidate()

        }

    }
}