var BubbleMeter = Container.expand(function () {
	var self = Container.call(this);
	var meterGraphics = self.createAsset('bubbleMeter', 'Bubble Meter', 0, 0.5);
	self.maxPower = 100;
	self.currentPower = 1;
	self.decreaseRate = 1;
	self.recoveryRate = 0.5;
	self.update = function (urchin) {
		if (urchin.scale.x > 1 && self.currentPower > 0) {
			self.currentPower -= self.decreaseRate;
		} else if (self.currentPower < self.maxPower) {
			self.currentPower += self.recoveryRate;
		}
		meterGraphics.scale.x = self.currentPower / self.maxPower;
		if (meterGraphics.texture && meterGraphics.texture.width) {
			meterGraphics.width = self.currentPower / self.maxPower * meterGraphics.texture.width;
		}
	};
	self.reset = function () {
		self.currentPower = 1;
	};
	return self;
});
var Urchin = Container.expand(function () {
	var self = Container.call(this);
	var urchinGraphics = self.createAsset('urchinWithSpikes', 'Urchin character with spikes', .5, .5);
	self.health = 5;
	self.speed = 5;
	self.move = function (deltaX, deltaY) {
		var inertia = 0.95;
		var maxSpeed = 5;
		this.vx = (this.vx || 0) * inertia + deltaX * 0.05;
		this.vy = (this.vy || 0) * inertia + deltaY * 0.05;
		this.vx = Math.sign(this.vx) * Math.min(Math.abs(this.vx), maxSpeed);
		this.vy = Math.sign(this.vy) * Math.min(Math.abs(this.vy), maxSpeed);
		this.x += this.vx;
		this.y += this.vy;
	};
	self.push = function (bubbleMeter) {
		if (bubbleMeter) {
			var expansion = Math.min(this.scale.x + bubbleMeter.currentPower, 5);
			this.scale.set(expansion);
			bubbleMeter.currentPower = 0;
		}
	};
});
var Fish = Container.expand(function () {
	var self = Container.call(this);
	Fish.prototype.pushAway = function (urchin) {
		this.pushed = true;
		this.pushDirection = {
			x: this.x - urchin.x,
			y: this.y - urchin.y
		};
		var pushMagnitude = Math.sqrt(this.pushDirection.x * this.pushDirection.x + this.pushDirection.y * this.pushDirection.y);
		this.pushDirection.x /= pushMagnitude;
		this.pushDirection.y /= pushMagnitude;
	};
	var fishGraphics = self.createAsset('fish', 'Fish character', .5, .5);
	self.speed = 3;
	self.move = function (urchinX, urchinY) {
		var dx = urchinX - this.x;
		var dy = urchinY - this.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < 500) {
			var directionX = dx > 0 ? 1 : -1;
			var directionY = dy > 0 ? 1 : -1;
			this.x -= this.speed * directionX;
			this.y -= this.speed * directionY;
			fishGraphics.scale.x = -directionX;
		}
	};
});
var BubbleSpawner = Container.expand(function () {
	var self = Container.call(this);
	return self;
});
var Game = Container.expand(function () {
	var self = Container.call(this);
	var bubbleSpawner = self.addChild(new BubbleSpawner());
	var background = self.createAsset('background', 'Game background', 0.5, 0.5);
	background.alpha = 0.5;
	background.x = 2048 / 2;
	background.y = 2732 / 2;
	self.addChildAt(background, 0);
	LK.stageContainer.setBackgroundColor(0x000000);
	var urchin = self.addChild(new Urchin());
	var bubbleMeter = self.addChild(new BubbleMeter());
	bubbleMeter.x = 0;
	bubbleMeter.y = 2732 - bubbleMeter.height / 2;
	LK.gui.bottomLeft.addChild(bubbleMeter);
	var fishes = [];
	var scoreTxt = new Text2('0', {
		size: 150,
		fill: "#ffffff"
	});
	LK.gui.topCenter.addChild(scoreTxt);
	urchin.x = 2048 / 2;
	urchin.y = 2732 / 2;
	var dragNode = null;
	stage.on('down', function (obj) {
		var event = obj.event;
		var pos = event.getLocalPosition(self);
		var distance = Math.sqrt(Math.pow(pos.x - urchin.x, 2) + Math.pow(pos.y - urchin.y, 2));
		if (distance > urchin.width / 2 && bubbleMeter && bubbleMeter.currentPower > 0) {
			urchin.push(bubbleMeter);
		} else {
			dragNode = urchin;
		}
	});
	function handleMove(obj) {
		var event = obj.event;
		var pos = event.getLocalPosition(self);
		if (dragNode) {
			dragNode.x = pos.x;
			dragNode.y = pos.y;
		}
	}
	stage.on('move', handleMove);
	stage.on('up', function (obj) {
		dragNode = null;
		urchin.scale.set(1);
		bubbleMeter.currentPower = 0;
	});
	LK.on('tick', function () {
		urchin.move();
		for (var i = 0; i < fishes.length; i++) {
			fishes[i].move(urchin.x, urchin.y);
			if (urchin.intersects(fishes[i])) {
				if (urchin.scale.x === 1) {
					urchin.health -= 1;
					if (urchin.health <= 0) {}
				} else {
					fishes[i].pushAway(urchin);
				}
				scoreTxt.text = (Number(scoreTxt.text) + 1).toString();
			}
		}
		if (Math.random() < 0.01 && fishes.length < 20) {
			var newFish = new Fish();
			var side = Math.floor(Math.random() * 4);
			var targetX, targetY;
			switch (side) {
				case 0:
					newFish.x = -100;
					newFish.y = Math.random() * 2732;
					targetX = 2048 + 100;
					targetY = newFish.y;
					break;
				case 1:
					newFish.x = Math.random() * 2048;
					newFish.y = -100;
					targetX = newFish.x;
					targetY = 2732 + 100;
					break;
				case 2:
					newFish.x = 2048 + 100;
					newFish.y = Math.random() * 2732;
					targetX = -100;
					targetY = newFish.y;
					break;
				case 3:
					newFish.x = Math.random() * 2048;
					newFish.y = 2732 + 100;
					targetX = newFish.x;
					targetY = -100;
					break;
			}
			newFish.move = function () {
				if (this.pushed) {
					this.x += this.pushDirection.x * 20;
					this.y += this.pushDirection.y * 20;
					if (this.x < -100 || this.x > 2148 || this.y < -100 || this.y > 2832) {
						this.destroy();
					}
				} else {
					var dx = targetX - this.x;
					var dy = targetY - this.y;
					var distance = Math.sqrt(dx * dx + dy * dy);
					if (distance > 0) {
						var angle = Math.atan2(dy, dx);
						this.x += Math.cos(angle) * this.speed;
						this.y += Math.sin(angle) * this.speed;
					}
				}
			};
			fishes.push(newFish);
			self.addChild(newFish);
		}
	});
});

===================================================================
--- original.js
+++ change.js
@@ -1,19 +1,4 @@
-var Bubble = Container.expand(function () {
-	var self = Container.call(this);
-	var bubbleGraphics = self.createAsset('bubble', 'Bubble collectible', .5, .5);
-	self.direction = Math.random() < 0.5 ? -1 : 1;
-	self.amplitude = Math.random() * 5 + 5;
-	self.frequency = Math.random() * 0.05 + 0.05;
-	self.on('tick', function () {
-		self.x += Math.sin(LK.ticks * self.frequency) * self.amplitude * self.direction;
-		self.y += 2;
-		if (self.y < -self.height / 2) {
-			self.destroy();
-		}
-	});
-	return self;
-});
 var BubbleMeter = Container.expand(function () {
 	var self = Container.call(this);
 	var meterGraphics = self.createAsset('bubbleMeter', 'Bubble Meter', 0, 0.5);
 	self.maxPower = 100;
@@ -87,20 +72,8 @@
 	};
 });
 var BubbleSpawner = Container.expand(function () {
 	var self = Container.call(this);
-	self.bubbles = [];
-	self.bubbles = [];
-	self.spawnBubble = function () {
-		if (Math.random() < 0.05 && self.bubbles.length < 3) {
-			var newBubble = new Bubble();
-			newBubble.x = Math.random() * 2048;
-			newBubble.y = 2732;
-			self.bubbles.push(newBubble);
-			LK.stage.addChild(newBubble);
-		}
-	};
-	LK.on('tick', self.spawnBubble);
 	return self;
 });
 var Game = Container.expand(function () {
 	var self = Container.call(this);
@@ -150,9 +123,8 @@
 		bubbleMeter.currentPower = 0;
 	});
 	LK.on('tick', function () {
 		urchin.move();
-		bubbleMeter.update(urchin);
 		for (var i = 0; i < fishes.length; i++) {
 			fishes[i].move(urchin.x, urchin.y);
 			if (urchin.intersects(fishes[i])) {
 				if (urchin.scale.x === 1) {