var score = 0;
var gameWinStatus = 0;
var isPaused = false;
var availableGiftsCounter = 0;
var secondsBeforeChristmas = 86400 - 1;
var giftsNeeded = 8000000000;
var MAX_DISPLAY_GIFTS = 10;
var MAX_IDLE_TIME = 1;
var workerRegistry = {
	'elf': {
		'index': 0,
		'className': 'Elf',
		'scoreMultiplier': 1,
		'baseCost': 10,
		'workerCount': 0,
		'walkingWorkers': [],
		'gifts': 0
	},
	'ginger': {
		'index': 1,
		'className': 'Ginger',
		'scoreMultiplier': 10,
		'baseCost': 100,
		'workerCount': 0,
		'walkingWorkers': [],
		'gifts': 0
	},
	'teddy': {
		'index': 2,
		'className': 'Teddy',
		'scoreMultiplier': 100,
		'baseCost': 1000,
		'workerCount': 0,
		'walkingWorkers': [],
		'gifts': 0
	},
	'soldier': {
		'index': 3,
		'className': 'Soldier',
		'scoreMultiplier': 1000,
		'baseCost': 10000,
		'workerCount': 0,
		'walkingWorkers': [],
		'gifts': 0
	},
	'reindeer': {
		'index': 4,
		'className': 'Reindeer',
		'scoreMultiplier': 10000,
		'baseCost': 100000,
		'workerCount': 0,
		'walkingWorkers': [],
		'gifts': 0
	},
	'grinch': {
		'index': 5,
		'className': 'Grinch',
		'scoreMultiplier': 100000,
		'baseCost': 1000000,
		'workerCount': 0,
		'walkingWorkers': [],
		'gifts': 0
	},
	'fairy': {
		'index': 6,
		'className': 'Fairy',
		'scoreMultiplier': 1000000,
		'baseCost': 10000000,
		'workerCount': 0,
		'walkingWorkers': [],
		'gifts': 0
	}
};
for (var key in workerRegistry) {
	if (workerRegistry.hasOwnProperty(key)) {
		Object.defineProperty(workerRegistry[key], 'cost', {
			get: function () {
				return Math.pow(2, this.workerCount) * this.baseCost;
			}
		});
	}
}
var workersTypesCount = Object.keys(workerRegistry).length;
var createWorkerWorkFunction = function (workerType, self, gifts) {
	score += Math.floor(workerType.workerCount * workerType.scoreMultiplier * (1 + 0.1 * (workerType.workerCount - 1)));
	if (workerType.gifts < MAX_DISPLAY_GIFTS * (workerType.index + 1)) {
		var newGift = new GenericGift(workerType);
		newGift.x = Math.random() * 2048;
		newGift.y = -100 - Math.random() * 100;
		workerType.gifts++;
		gifts.push(newGift);
		self.addChild(newGift);
	}
	if (workerType.walkingWorkers.length < workerType.workerCount) {
		var workingWorker = new WorkingWorker(workerType);
		workingWorker.startFromLeft = Math.random() < 0.5;
		workingWorker.x = workingWorker.startFromLeft ? -workingWorker.width : 2048 + workingWorker.width;
		workingWorker.y = 2500 - Math.random() * (2500 / 4);
		workerType.walkingWorkers.push(workingWorker);
		self.addChild(workingWorker);
	}
};
function formatTime(nbSeconds) {
	var days = Math.floor(nbSeconds / 86400);
	var hours = Math.floor(nbSeconds % 86400 / 3600);
	var minutes = Math.floor(nbSeconds % 3600 / 60);
	var seconds = Math.floor(nbSeconds % 60);
	days = days.toString().padStart(2, '0');
	hours = hours.toString().padStart(2, '0');
	minutes = minutes.toString().padStart(2, '0');
	seconds = seconds.toString().padStart(2, '0');
	if (nbSeconds > 86400) {
		return days + 'd ' + hours + 'h ' + minutes + 'min';
	} else {
		return hours + 'h ' + minutes + 'min ' + seconds + 'sec';
	}
}
function formatNumber(num) {
	if (num >= 1000000000) {
		return (num % 1000000000 === 0 ? num / 1000000000 : (num / 1000000000).toFixed(1)) + 'B';
	}
	if (num >= 1000000) {
		return (num % 1000000 === 0 ? num / 1000000 : (num / 1000000).toFixed(1)) + 'M';
	}
	if (num >= 1000) {
		return (num % 1000 === 0 ? num / 1000 : (num / 1000).toFixed(1)) + 'K';
	}
	return num;
}
function formatWorkerCounter(num) {
	if (!num) {
		return '';
	} else if (num < 10) {
		return ' ' + num;
	} else {
		return num.toString();
	}
}
var winAnimation = function (self, giftWrapper) {
	gameWinStatus = 1;
	var winBackground = self.createAsset('winBackground', 'Win Background Image', 0, 0.05);
	winBackground.scale.set(2, 3);
	self.addChildAt(winBackground, 1);
	giftWrapper.visible = false;
	if (!self.santaAdded) {
		var santaClaus = new SantaClaus();
		santaClaus.x = -100;
		santaClaus.y = 2732 * 0.25;
		self.addChild(santaClaus);
		self.santaAdded = true;
	}
	for (var i = 0; i < 50; i++) {
		var confettiPiece = new Confetti();
		confettiPiece.x = Math.random() * 2048;
		confettiPiece.y = Math.random() * 2732;
		self.addChild(confettiPiece);
	}
	LK.setTimeout(function () {
		LK.showGameOver(false);
		santaClaus.destroy();
	}, 7000);
};
var loseAnimation = function (self, giftWrapper) {
	gameWinStatus = -1;
	var lostBackground = self.createAsset('lostBackground', 'Lost Background Image', 0, 0.06);
	lostBackground.scale.set(2, 3);
	self.addChildAt(lostBackground, 1);
	giftWrapper.visible = false;
	for (var i = 0; i < 100; i++) {
		var raindrop = new Raindrop();
		raindrop.x = Math.random() * 2048;
		raindrop.y = -Math.random() * 2732;
		self.addChild(raindrop);
	}
	LK.setTimeout(function () {
		LK.showGameOver();
	}, 7000);
};
var cleanScreen = function (gifts) {
	for (var a = gifts.length - 1; a >= 0; a--) {
		gifts[a].remove();
		gifts[a].destroy();
		gifts.splice(a, 1);
	}
};
var HireButton = Container.expand(function (workerType) {
	var self = Container.call(this);
	var buttonGraphics = self.createAsset('hire' + workerType.className, 'Hire ' + workerType.className + ' Button', 0.5, 0.5);
	buttonGraphics.scale.set(2);
	self.on('down', function () {
		if (isPaused) {
			return;
		}
		console.log("Try buy " + workerType.className);
		var cost = Math.pow(2, workerType.workerCount) * workerType.baseCost;
		if (score >= cost) {
			score -= cost;
			workerType.workerCount += 1;
			LK.effects.flashScreen(0x00E0F2, 250);
		}
	});
});
var WorkingWorker = Container.expand(function (workerType) {
	var self = Container.call(this);
	self.createAsset('working' + workerType.className, 'Working ' + workerType.className + ' Graphics', .5, .5);
	self.speed = 3 + Math.random() * 2;
	self.move = function () {
		if (self.startFromLeft) {
			self.x += self.speed;
		} else {
			self.x -= self.speed;
			self.scale.x = -1;
		}
	};
});
var GenericGift = Container.expand(function (workerType) {
	var self = Container.call(this);
	self.createAsset(workerType.className + 'Gift', workerType.className + ' Gift Graphics', .5, .5);
	self.speed = 4 + Math.random() * 2;
	self.move = function () {
		self.y += self.speed;
	};
	Object.defineProperty(self, 'remove', {
		value: function () {
			workerType.gifts--;
		}
	});
});
var SantaClaus = Container.expand(function () {
	var self = Container.call(this);
	var santaGraphics = self.createAsset('santaClaus', 'Santa Claus Graphics', 0.5, 0.5);
	self.speed = 6;
	self.move = function () {
		self.x += self.speed;
	};
	LK.on('tick', function () {
		self.move();
	});
});
var Raindrop = Container.expand(function () {
	var self = Container.call(this);
	var raindropGraphics = self.createAsset('raindrop', 'Raindrop Graphics', 0.5, 0.5);
	self.speed = Math.random() * 5 + 5;
	self.move = function () {
		self.y += self.speed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
	LK.on('tick', function () {
		self.move();
	});
});
var Confetti = Container.expand(function () {
	var self = Container.call(this);
	var colors = [0xFF0000, 0x00FF00, 0x0000FF, 0xFFFF00, 0xFF00FF, 0x00FFFF];
	var confettiGraphics = self.createAsset('confetti', 'Confetti Graphics', 0.5, 0.5);
	confettiGraphics.tint = colors[Math.floor(Math.random() * colors.length)];
	self.speed = Math.random() * 5 + 2;
	self.rotationSpeed = Math.random() * 0.1;
	self.move = function () {
		self.y += self.speed;
		self.rotation += self.rotationSpeed;
		if (self.y > 2732) {
			self.destroy();
		}
	};
	LK.on('tick', function () {
		self.move();
	});
});
var Gift = Container.expand(function () {
	var self = Container.call(this);
	self.createAsset('gift', 'Gift Graphics', .5, .5);
	self.speed = 5;
	self.move = function () {
		self.y += self.speed;
	};
	Object.defineProperty(self, 'remove', {
		value: function () {
			availableGiftsCounter--;
		}
	});
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var background = self.createAsset('background', 'Background Image', 0, 0);
	background.scale.set(2, 2.5);
	self.addChildAt(background, 0);
	var giftWrapper = self.createAsset('giftWrapper', 'Big central button', 0.5, 0.5);
	giftWrapper.scale.set(5);
	giftWrapper.x = 2048 / 2;
	giftWrapper.y = 2732 / 4;
	giftWrapper.on('down', function () {
		if (isPaused) {
			return;
		}
		clickCount++;
		score++;
		availableGiftsCounter++;
		giftWrapper.scale.set(4.5);
		LK.setTimeout(function () {
			giftWrapper.scale.set(5);
		}, 300);
	});
	var gifts = [];
	var clickCount = 0;
	var startTime = Date.now();
	var scoreTxt = new Text2('0', {
		size: 150,
		fill: "#00E0F2",
		font: "'Arial-BoldMT',Arial,sans-serif"
	});
	var giftsWrappedLabel = new Text2('Gifts wrapped', {
		size: 50,
		fill: "#00E0F2"
	});
	var giftsNeededTxt = new Text2(giftsNeeded + '', {
		size: 50,
		fill: "#00E0F2"
	});
	var giftsNeededLabel = new Text2('Gifts needed', {
		size: 50,
		fill: "#00E0F2"
	});
	var xmasCountdownLabel = new Text2('Xmas Countdown', {
		size: 50,
		fill: "#00E0F2"
	});
	var secondsBeforeChristmasTxt = new Text2(formatTime(secondsBeforeChristmas), {
		size: 50,
		fill: "#00E0F2"
	});
	scoreTxt.anchor.set(.5, -0.2);
	LK.gui.topCenter.addChild(scoreTxt);
	giftsNeededTxt.anchor.set(1.0, 1);
	LK.gui.bottomRight.addChild(giftsNeededTxt);
	giftsNeededLabel.anchor.set(1, 2);
	LK.gui.bottomRight.addChild(giftsNeededLabel);
	giftsWrappedLabel.anchor.set(.5, 0);
	LK.gui.topCenter.addChild(giftsWrappedLabel);
	xmasCountdownLabel.anchor.set(0, 2);
	LK.gui.bottomLeft.addChild(xmasCountdownLabel);
	secondsBeforeChristmasTxt.anchor.set(-0.025, 1);
	LK.gui.bottomLeft.addChild(secondsBeforeChristmasTxt);
	for (var workerType in workerRegistry) {
		if (workerRegistry.hasOwnProperty(workerType)) {
			var workerInfo = workerRegistry[workerType];
			console.log("Create UI for " + workerType);
			workerInfo.uiWorkerHire = self.addChild(new HireButton(workerInfo));
			workerInfo.uiWorkerHire.x = 1920;
			workerInfo.uiWorkerHire.y = 140 + 330 * workerInfo.index;
			workerInfo.uiWorkerCount = new Text2('', {
				size: 100,
				fill: "#eeb5ac"
			});
			workerInfo.uiWorkerCount.x = 450;
			workerInfo.uiWorkerCount.y = 60 + 226 * workerInfo.index;
			LK.gui.topCenter.addChild(workerInfo.uiWorkerCount);
			workerInfo.uiWorkerCost = new Text2('', {
				size: 50,
				fill: "#eeb5ac",
				font: "'Arial-BoldMT',Arial,sans-serif"
			});
			workerInfo.uiWorkerCost.anchor.set(0.5, 0);
			workerInfo.uiWorkerCost.x = 1340;
			workerInfo.uiWorkerCost.y = 180 + 235 * workerInfo.index;
			LK.gui.addChild(workerInfo.uiWorkerCost);
		}
	}
	LK.setInterval(function () {
		if (isPaused) {
			return;
		}
		if (score >= giftsNeeded) {
			winAnimation(self, giftWrapper);
		} else if (secondsBeforeChristmas === 0 && score < giftsNeeded) {
			loseAnimation(self, giftWrapper);
		}
		if (gameWinStatus !== 0) {
			cleanScreen(gifts);
			return;
		}
		for (var workerType in workerRegistry) {
			if (workerRegistry.hasOwnProperty(workerType)) {
				var workerInfo = workerRegistry[workerType];
				if (workerInfo.workerCount > 0) {
					createWorkerWorkFunction(workerInfo, self, gifts);
				}
			}
		}
		if (availableGiftsCounter > 0) {
			var newGift = new Gift();
			newGift.x = Math.random() * 2048;
			newGift.y = 0;
			gifts.push(newGift);
			self.addChild(newGift);
		}
		for (var workerType in workerRegistry) {
			if (workerRegistry.hasOwnProperty(workerType)) {
				var workerInfo = workerRegistry[workerType];
				self.addChild(workerInfo.uiWorkerHire);
				LK.gui.topCenter.addChild(workerInfo.uiWorkerCount);
				LK.gui.addChild(workerInfo.uiWorkerCost);
			}
		}
		self.addChild(giftWrapper);
	}, 1000);
	LK.on('tick', function () {
		var currentTime = Date.now();
		var elapsedTime = (currentTime - startTime) / 1000;
		if (elapsedTime > MAX_IDLE_TIME) {
			if (!isPaused && score > 0) {
				console.log("Idle => Pausing...");
				isPaused = true;
				return;
			}
			unPauseCounter = 0;
		} else {
			if (isPaused) {
				unPauseCounter++;
				if (unPauseCounter > 250) {
					console.log("Back => Unpausing...");
					isPaused = false;
				}
			}
		}
		startTime = currentTime;
		if (isPaused) {
			return;
		}
		secondsBeforeChristmas = Math.max(0, secondsBeforeChristmas - 24 * elapsedTime);
		secondsBeforeChristmasTxt.setText(formatTime(secondsBeforeChristmas));
		for (var a = gifts.length - 1; a >= 0; a--) {
			gifts[a].move();
			if (gifts[a].y > 2732 + gifts[a].height) {
				gifts[a].remove();
				gifts[a].destroy();
				gifts.splice(a, 1);
			}
		}
		scoreTxt.setText(score.toLocaleString());
		giftsNeededTxt.setText(Math.max(0, giftsNeeded - score).toLocaleString());
		for (var workerType in workerRegistry) {
			if (workerRegistry.hasOwnProperty(workerType)) {
				var workerInfo = workerRegistry[workerType];
				if (!workerInfo.hireVisible && score > workerInfo.cost * 0.5) {
					workerInfo.hireVisible = true;
				}
				if (gameWinStatus === 0 && workerInfo.hireVisible) {
					workerInfo.uiWorkerCost.setText(formatNumber(workerInfo.cost));
					workerInfo.uiWorkerCount.setText(formatWorkerCounter(workerInfo.workerCount));
					workerInfo.uiWorkerHire.alpha = score < workerInfo.cost ? 0.5 : 1;
					workerInfo.uiWorkerHire.interactive = score >= workerInfo.cost;
				} else {
					workerInfo.uiWorkerCount.setText('');
					workerInfo.uiWorkerCost.setText('');
					workerInfo.uiWorkerHire.alpha = 0;
					workerInfo.uiWorkerHire.interactive = false;
				}
				for (var e = workerInfo.walkingWorkers.length - 1; e >= 0; e--) {
					var walker = workerInfo.walkingWorkers[e];
					walker.move();
					if (walker.startFromLeft && walker.x > 2048 + walker.width || !walker.startFromLeft && walker.x < -200) {
						walker.destroy();
						workerInfo.walkingWorkers.splice(e, 1);
					}
				}
			}
		}
	});
});

===================================================================
--- original.js
+++ change.js
@@ -358,9 +358,10 @@
 			workerInfo.uiWorkerCount.y = 60 + 226 * workerInfo.index;
 			LK.gui.topCenter.addChild(workerInfo.uiWorkerCount);
 			workerInfo.uiWorkerCost = new Text2('', {
 				size: 50,
-				fill: "#eeb5ac"
+				fill: "#eeb5ac",
+				font: "'Arial-BoldMT',Arial,sans-serif"
 			});
 			workerInfo.uiWorkerCost.anchor.set(0.5, 0);
 			workerInfo.uiWorkerCost.x = 1340;
 			workerInfo.uiWorkerCost.y = 180 + 235 * workerInfo.index;