===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,195 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Bullet = Container.expand(function () {
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -15;
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+var Crosshair = Container.expand(function () {
+	var self = Container.call(this);
+	var outerRing = self.attachAsset('crosshair', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	var centerDot = self.attachAsset('crosshairCenter', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	return self;
+});
+var Duck = Container.expand(function () {
+	var self = Container.call(this);
+	var duckBody = self.attachAsset('duck', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	var leftWing = self.attachAsset('duckWing', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		x: -30,
+		y: -10
+	});
+	var rightWing = self.attachAsset('duckWing', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		x: 30,
+		y: -10
+	});
+	self.speed = 3;
+	self.direction = 1;
+	self.wingAnimation = 0;
+	self.isHit = false;
+	self.update = function () {
+		if (self.isHit) return;
+		self.x += self.speed * self.direction;
+		// Wing flapping animation
+		self.wingAnimation += 0.3;
+		leftWing.rotation = Math.sin(self.wingAnimation) * 0.5;
+		rightWing.rotation = -Math.sin(self.wingAnimation) * 0.5;
+	};
+	self.hit = function () {
+		if (self.isHit) return false;
+		self.isHit = true;
+		LK.getSound('hit').play();
+		// Duck falls down when hit
+		tween(self, {
+			y: self.y + 200,
+			rotation: Math.PI
+		}, {
+			duration: 800,
+			easing: tween.easeIn,
+			onFinish: function onFinish() {
+				self.destroy();
+			}
+		});
+		return true;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+// Game variables
+var crosshair;
+var ducks = [];
+var bullets = [];
+var duckSpawnTimer = 0;
+var gameScore = 0;
+var difficulty = 1;
+// Initialize crosshair
+crosshair = game.addChild(new Crosshair());
+crosshair.x = 1024;
+crosshair.y = 2600;
+// Initialize score display
+var scoreTxt = new Text2('Score: 0', {
+	size: 80,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Game controls
+game.move = function (x, y, obj) {
+	crosshair.x = x;
+	crosshair.y = Math.max(y, 2400); // Keep crosshair in bottom portion
+};
+game.down = function (x, y, obj) {
+	// Shoot bullet
+	var bullet = new Bullet();
+	bullet.x = crosshair.x;
+	bullet.y = crosshair.y - 50;
+	bullets.push(bullet);
+	game.addChild(bullet);
+	LK.getSound('shoot').play();
+};
+function spawnDuck() {
+	var duck = new Duck();
+	// Random spawn side
+	if (Math.random() < 0.5) {
+		duck.x = -100;
+		duck.direction = 1;
+	} else {
+		duck.x = 2148;
+		duck.direction = -1;
+	}
+	// Random height in upper half of screen
+	duck.y = Math.random() * 800 + 400;
+	// Random speed based on difficulty
+	duck.speed = 2 + Math.random() * 3 + difficulty * 0.5;
+	ducks.push(duck);
+	game.addChild(duck);
+	LK.getSound('quack').play();
+}
+game.update = function () {
+	duckSpawnTimer++;
+	// Spawn ducks based on difficulty
+	var spawnRate = Math.max(60 - difficulty * 5, 30);
+	if (duckSpawnTimer >= spawnRate) {
+		spawnDuck();
+		duckSpawnTimer = 0;
+	}
+	// Update and check bullets
+	for (var i = bullets.length - 1; i >= 0; i--) {
+		var bullet = bullets[i];
+		// Remove bullets that go off screen
+		if (bullet.y < -50) {
+			bullet.destroy();
+			bullets.splice(i, 1);
+			continue;
+		}
+		// Check bullet-duck collisions
+		for (var j = ducks.length - 1; j >= 0; j--) {
+			var duck = ducks[j];
+			if (!duck.isHit && bullet.intersects(duck)) {
+				if (duck.hit()) {
+					gameScore += 10 * difficulty;
+					LK.setScore(gameScore);
+					scoreTxt.setText('Score: ' + gameScore);
+					// Remove duck from array
+					ducks.splice(j, 1);
+					// Remove bullet
+					bullet.destroy();
+					bullets.splice(i, 1);
+					break;
+				}
+			}
+		}
+	}
+	// Check for ducks that escaped
+	for (var k = ducks.length - 1; k >= 0; k--) {
+		var duck = ducks[k];
+		if (!duck.isHit && (duck.x < -150 || duck.x > 2200)) {
+			duck.destroy();
+			ducks.splice(k, 1);
+		}
+	}
+	// Increase difficulty every 100 points
+	var newDifficulty = Math.floor(gameScore / 100) + 1;
+	if (newDifficulty > difficulty) {
+		difficulty = newDifficulty;
+	}
+	// Win condition - score 500 points
+	if (gameScore >= 500) {
+		LK.showYouWin();
+	}
+};
\ No newline at end of file