var PlayerHealth = Container.expand(function () {
	var self = Container.call(this);
	self.hp = 10;
	var healthBarBackground = self.createAsset('healthBarBackground', 'Health Bar Background', 0, 0);
	var healthBarForeground = self.createAsset('healthBarForeground', 'Health Bar Foreground', 0, 0);
	healthBarForeground.tint = 0x00FF00;
	self.updateHealthBar = function () {
		healthBarForeground.scale.x = self.hp / 10;
		var healthText = new Text2(self.hp.toString(), {
			size: 50,
			fill: "#ffffff"
		});
		healthText.anchor.set(0.5, 0.5);
		healthText.x = healthBarBackground.width / 2;
		healthText.y = healthBarBackground.height / 2;
		if (self.healthText) self.healthText.destroy();
		self.healthText = healthText;
		self.addChild(self.healthText);
	};
	self.updateHealthBar();
});
var BeatColumn1 = Container.expand(function () {
	var self = Container.call(this);
	var beatGraphics = self.createAsset('beatColumn1', 'Beat Graphics Column 1', .5, .5);
	self.speed = 5;
	self.move = function () {
		self.y += self.speed;
	};
});
var BeatColumn2 = Container.expand(function () {
	var self = Container.call(this);
	var beatGraphics = self.createAsset('beatColumn2', 'Beat Graphics Column 2', .5, .5);
	self.speed = 5;
	self.move = function () {
		self.y += self.speed;
	};
});
var BeatColumn3 = Container.expand(function () {
	var self = Container.call(this);
	var beatGraphics = self.createAsset('beatColumn3', 'Beat Graphics Column 3', .5, .5);
	self.speed = 5;
	self.move = function () {
		self.y += self.speed;
	};
});
var BeatColumn4 = Container.expand(function () {
	var self = Container.call(this);
	var beatGraphics = self.createAsset('beatColumn4', 'Beat Graphics Column 4', .5, .5);
	self.speed = 5;
	self.move = function () {
		self.y += self.speed;
	};
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.createAsset('player', 'Player Graphics', .5, .5);
	self.dance = function () {};
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	self.gameTimer = 180;
	self.timerText = new Text2(self.gameTimer.toString(), {
		size: 150,
		fill: "#000000"
	});
	self.timerText.anchor.set(0.5, 0);
	LK.gui.topCenter.addChild(self.timerText);
	self.updateTimer = function () {
		if (self.gameTimer > 0) {
			self.gameTimer--;
			self.timerText.setText(self.gameTimer.toString());
			if (self.gameTimer == 100) {
				BeatColumn1.prototype.speed = 10;
				BeatColumn2.prototype.speed = 10;
				BeatColumn3.prototype.speed = 10;
				BeatColumn4.prototype.speed = 10;
			}
		} else {
			LK.showGameOver('You Are Buck!');
		}
	};
	self.timerInterval = LK.setInterval(self.updateTimer, 1000);
	var score = 0;
	var scoreTxt = new Text2(score.toString(), {
		size: 150,
		fill: "#ffffff"
	});
	scoreTxt.anchor.set(1, 0);
	LK.gui.topRight.addChild(scoreTxt);
	var playerHealth = self.addChild(new PlayerHealth());
	playerHealth.x = 10;
	playerHealth.y = 10;
	LK.gui.topLeft.addChild(playerHealth);
	var background = self.createAsset('background', 'Background Image', 0, 0);
	self.addChildAt(background, 0);
	var beats = [];
	var player = self.addChild(new Player());
	player.x = 2048 / 2;
	var floorHeight = 100;
	var playerFloorOffset = player.height / 2 + floorHeight;
	player.y = 2732 - playerFloorOffset;
	var floor = self.createAsset('floor', 'Floor Graphics', 0, 1);
	floor.y = 2732 - floorHeight;
	self.addChildAt(floor, 1);
	LK.on('tick', function () {
		player.dance();
		for (var a = beats.length - 1; a >= 0; a--) {
			var beat = beats[a];
			beat.move();
			if (player.intersects(beat)) {
				score += 100;
				scoreTxt.setText(score.toString());
				playerHealth.hp += 1;
				playerHealth.updateHealthBar();
				if (playerHealth.hp >= 100) {
					LK.showGameOver('You Are Buck!');
				} else if (playerHealth.hp <= 0) {
					LK.showGameOver('You Are Buck!');
				}
				if (playerHealth.hp <= 0) {
					LK.showGameOver();
				}
				beat.destroy();
				beats.splice(a, 1);
			} else if (beat.y > 2732) {
				score -= 50;
				scoreTxt.setText(score.toString());
				if (score <= 0) {
					LK.showGameOver('Game Over! Your score reached 0.');
				}
				beat.destroy();
				beats.splice(a, 1);
			}
		}
		if (LK.ticks % 60 == 0) {
			var columnWidth = 2048 / 4;
			var columnIndex = Math.floor(Math.random() * 4);
			var newBeat;
			switch (columnIndex) {
				case 0:
					newBeat = new BeatColumn1();
					break;
				case 1:
					newBeat = new BeatColumn2();
					break;
				case 2:
					newBeat = new BeatColumn3();
					break;
				case 3:
					newBeat = new BeatColumn4();
					break;
			}
			newBeat.x = columnIndex * columnWidth + columnWidth / 2;
			newBeat.y = 0;
			beats.push(newBeat);
			self.addChild(newBeat);
		}
	});
	stage.on('down', function (obj) {
		var event = obj.event;
		var pos = event.getLocalPosition(self);
		var columnWidth = 2048 / 4;
		var columnIndex = Math.floor(pos.x / columnWidth);
		player.x = columnIndex * columnWidth + columnWidth / 2;
	});
});

===================================================================
--- original.js
+++ change.js
@@ -23,33 +23,33 @@
 	var self = Container.call(this);
 	var beatGraphics = self.createAsset('beatColumn1', 'Beat Graphics Column 1', .5, .5);
 	self.speed = 5;
 	self.move = function () {
-		self.y += self.gameTimer <= 100 ? self.speed * 2 : self.speed;
+		self.y += self.speed;
 	};
 });
 var BeatColumn2 = Container.expand(function () {
 	var self = Container.call(this);
 	var beatGraphics = self.createAsset('beatColumn2', 'Beat Graphics Column 2', .5, .5);
 	self.speed = 5;
 	self.move = function () {
-		self.y += self.gameTimer <= 100 ? self.speed * 2 : self.speed;
+		self.y += self.speed;
 	};
 });
 var BeatColumn3 = Container.expand(function () {
 	var self = Container.call(this);
 	var beatGraphics = self.createAsset('beatColumn3', 'Beat Graphics Column 3', .5, .5);
 	self.speed = 5;
 	self.move = function () {
-		self.y += self.gameTimer <= 100 ? self.speed * 2 : self.speed;
+		self.y += self.speed;
 	};
 });
 var BeatColumn4 = Container.expand(function () {
 	var self = Container.call(this);
 	var beatGraphics = self.createAsset('beatColumn4', 'Beat Graphics Column 4', .5, .5);
 	self.speed = 5;
 	self.move = function () {
-		self.y += self.gameTimer <= 100 ? self.speed * 2 : self.speed;
+		self.y += self.speed;
 	};
 });
 var Player = Container.expand(function () {
 	var self = Container.call(this);
@@ -68,8 +68,14 @@
 	self.updateTimer = function () {
 		if (self.gameTimer > 0) {
 			self.gameTimer--;
 			self.timerText.setText(self.gameTimer.toString());
+			if (self.gameTimer == 100) {
+				BeatColumn1.prototype.speed = 10;
+				BeatColumn2.prototype.speed = 10;
+				BeatColumn3.prototype.speed = 10;
+				BeatColumn4.prototype.speed = 10;
+			}
 		} else {
 			LK.showGameOver('You Are Buck!');
 		}
 	};