/**** 
* 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.velocityX = 0;
	self.velocityY = 0;
	self.speed = 8;
	self.bounces = 0;
	self.maxBounces = 5;
	self.active = true;
	self.update = function () {
		if (!self.active) return;
		// Store previous position for collision detection
		self.prevX = self.x;
		self.prevY = self.y;
		// Apply velocity
		self.x += self.velocityX;
		self.y += self.velocityY;
		// Check wall collisions
		for (var i = 0; i < walls.length; i++) {
			var wall = walls[i];
			if (self.intersects(wall)) {
				self.handleWallCollision(wall);
				break;
			}
		}
		// Check target collisions
		for (var i = targets.length - 1; i >= 0; i--) {
			var target = targets[i];
			if (self.intersects(target)) {
				self.hitTarget(target, i);
				return;
			}
		}
		// Remove if out of bounds or too many bounces
		if (self.x < -50 || self.x > 2098 || self.y < -50 || self.y > 2782 || self.bounces > self.maxBounces) {
			self.removeBullet();
		}
	};
	self.handleWallCollision = function (wall) {
		if (self.bounces >= self.maxBounces) {
			self.removeBullet();
			return;
		}
		// Calculate collision normal
		var bulletCenterX = self.x;
		var bulletCenterY = self.y;
		var wallCenterX = wall.x + wall.width / 2;
		var wallCenterY = wall.y + wall.height / 2;
		var dx = bulletCenterX - wallCenterX;
		var dy = bulletCenterY - wallCenterY;
		// Determine which side of the wall was hit
		var wallHalfWidth = wall.width / 2;
		var wallHalfHeight = wall.height / 2;
		if (Math.abs(dx) / wallHalfWidth > Math.abs(dy) / wallHalfHeight) {
			// Hit left or right side
			self.velocityX = -self.velocityX;
			self.x = dx > 0 ? wall.x + wall.width + 10 : wall.x - 10;
		} else {
			// Hit top or bottom side
			self.velocityY = -self.velocityY;
			self.y = dy > 0 ? wall.y + wall.height + 10 : wall.y - 10;
		}
		self.bounces++;
		LK.getSound('ricochet').play();
		// Flash effect on bounce
		LK.effects.flashObject(self, 0xffffff, 200);
	};
	self.hitTarget = function (target, index) {
		LK.getSound('hit').play();
		LK.effects.flashObject(target, 0xffffff, 300);
		// Remove target
		target.destroy();
		targets.splice(index, 1);
		// Update score
		LK.setScore(LK.getScore() + 100);
		updateUI();
		// Remove bullet
		self.removeBullet();
		// Check win condition
		if (targets.length === 0) {
			levelComplete();
		}
	};
	self.removeBullet = function () {
		self.active = false;
		self.destroy();
		for (var i = bullets.length - 1; i >= 0; i--) {
			if (bullets[i] === self) {
				bullets.splice(i, 1);
				break;
			}
		}
		// Check if no more bullets and targets remain
		if (bullets.length === 0 && targets.length > 0 && bulletsRemaining <= 0) {
			gameOver();
		}
	};
	return self;
});
var Cannon = Container.expand(function () {
	var self = Container.call(this);
	var cannonGraphics = self.attachAsset('cannon', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var aimLine = self.attachAsset('aimLine', {
		anchorX: 0.5,
		anchorY: 0,
		alpha: 0
	});
	self.isAiming = false;
	self.aimAngle = 0;
	self.startAiming = function (targetX, targetY) {
		self.isAiming = true;
		self.updateAim(targetX, targetY);
		aimLine.alpha = 0.7;
	};
	self.updateAim = function (targetX, targetY) {
		if (!self.isAiming) return;
		var dx = targetX - self.x;
		var dy = targetY - self.y;
		self.aimAngle = Math.atan2(dy, dx);
		aimLine.rotation = self.aimAngle + Math.PI / 2;
		cannonGraphics.rotation = self.aimAngle;
	};
	self.shoot = function () {
		if (!self.isAiming || bulletsRemaining <= 0) return;
		self.isAiming = false;
		aimLine.alpha = 0;
		var bullet = new Bullet();
		bullet.x = self.x;
		bullet.y = self.y;
		var speed = 8;
		bullet.velocityX = Math.cos(self.aimAngle) * speed;
		bullet.velocityY = Math.sin(self.aimAngle) * speed;
		bullets.push(bullet);
		game.addChild(bullet);
		bulletsRemaining--;
		updateUI();
		LK.getSound('shoot').play();
		// Recoil effect
		tween(cannonGraphics, {
			scaleX: 0.8,
			scaleY: 0.8
		}, {
			duration: 100
		});
		tween(cannonGraphics, {
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 200
		});
	};
	return self;
});
var Target = Container.expand(function () {
	var self = Container.call(this);
	var targetGraphics = self.attachAsset('target', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Gentle pulse animation
	var scale = 1;
	var scaleDirection = 1;
	self.update = function () {
		scale += 0.005 * scaleDirection;
		if (scale > 1.1) scaleDirection = -1;
		if (scale < 0.9) scaleDirection = 1;
		targetGraphics.scaleX = scale;
		targetGraphics.scaleY = scale;
	};
	return self;
});
var Wall = Container.expand(function () {
	var self = Container.call(this);
	var wallGraphics = self.attachAsset('wall', {
		anchorX: 0,
		anchorY: 0
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x1a1a1a
});

/**** 
* Game Code
****/ 
// Game variables
var bullets = [];
var targets = [];
var walls = [];
var cannon;
var bulletsRemaining = 5;
var currentLevel = 1;
// UI elements
var bulletCountText;
var levelText;
var scoreText;
// Initialize UI
function initializeUI() {
	bulletCountText = new Text2('Bullets: ' + bulletsRemaining, {
		size: 80,
		fill: 0xFFFFFF
	});
	bulletCountText.anchor.set(0, 0);
	bulletCountText.x = 120;
	bulletCountText.y = 20;
	LK.gui.topLeft.addChild(bulletCountText);
	levelText = new Text2('Level ' + currentLevel, {
		size: 80,
		fill: 0xFFFFFF
	});
	levelText.anchor.set(0.5, 0);
	LK.gui.top.addChild(levelText);
	scoreText = new Text2('Score: 0', {
		size: 60,
		fill: 0xFFFFFF
	});
	scoreText.anchor.set(1, 0);
	scoreText.x = -20;
	scoreText.y = 20;
	LK.gui.topRight.addChild(scoreText);
}
function updateUI() {
	bulletCountText.setText('Bullets: ' + bulletsRemaining);
	scoreText.setText('Score: ' + LK.getScore());
}
// Level creation
function createLevel1() {
	// Clear existing elements
	clearLevel();
	// Create cannon at bottom center
	cannon = new Cannon();
	cannon.x = 1024;
	cannon.y = 2500;
	game.addChild(cannon);
	// No walls in this level - enemies are closer to player
	// Create targets closer to player
	var target1 = new Target();
	target1.x = 800;
	target1.y = 2200;
	targets.push(target1);
	game.addChild(target1);
	var target2 = new Target();
	target2.x = 1200;
	target2.y = 2000;
	targets.push(target2);
	game.addChild(target2);
	var target3 = new Target();
	target3.x = 600;
	target3.y = 1800;
	targets.push(target3);
	game.addChild(target3);
	// Reset game state
	bulletsRemaining = 5;
	updateUI();
}
function clearLevel() {
	// Clear bullets
	for (var i = 0; i < bullets.length; i++) {
		bullets[i].destroy();
	}
	bullets = [];
	// Clear targets
	for (var i = 0; i < targets.length; i++) {
		targets[i].destroy();
	}
	targets = [];
	// Clear walls
	for (var i = 0; i < walls.length; i++) {
		walls[i].destroy();
	}
	walls = [];
	// Clear cannon
	if (cannon) {
		cannon.destroy();
		cannon = null;
	}
}
function levelComplete() {
	LK.effects.flashScreen(0x00ff00, 500);
	LK.setTimeout(function () {
		currentLevel++;
		if (currentLevel <= 5) {
			createNextLevel();
		} else {
			LK.showYouWin();
		}
	}, 1000);
}
function createNextLevel() {
	levelText.setText('Level ' + currentLevel);
	if (currentLevel === 2) {
		createLevel2();
	} else if (currentLevel === 3) {
		createLevel3();
	} else if (currentLevel === 4) {
		createLevel4();
	} else if (currentLevel === 5) {
		createLevel5();
	}
}
function createLevel2() {
	clearLevel();
	cannon = new Cannon();
	cannon.x = 200;
	cannon.y = 2500;
	game.addChild(cannon);
	// No walls - targets closer to player
	var target1 = new Target();
	target1.x = 500;
	target1.y = 2000;
	targets.push(target1);
	game.addChild(target1);
	var target2 = new Target();
	target2.x = 1000;
	target2.y = 2200;
	targets.push(target2);
	game.addChild(target2);
	var target3 = new Target();
	target3.x = 1500;
	target3.y = 1900;
	targets.push(target3);
	game.addChild(target3);
	var target4 = new Target();
	target4.x = 700;
	target4.y = 1700;
	targets.push(target4);
	game.addChild(target4);
	bulletsRemaining = 6;
	updateUI();
}
function createLevel3() {
	clearLevel();
	cannon = new Cannon();
	cannon.x = 1024;
	cannon.y = 2600;
	game.addChild(cannon);
	// No walls - many targets closer to player
	var target1 = new Target();
	target1.x = 400;
	target1.y = 2100;
	targets.push(target1);
	game.addChild(target1);
	var target2 = new Target();
	target2.x = 800;
	target2.y = 2000;
	targets.push(target2);
	game.addChild(target2);
	var target3 = new Target();
	target3.x = 1200;
	target3.y = 1900;
	targets.push(target3);
	game.addChild(target3);
	var target4 = new Target();
	target4.x = 600;
	target4.y = 1700;
	targets.push(target4);
	game.addChild(target4);
	var target5 = new Target();
	target5.x = 1000;
	target5.y = 1600;
	targets.push(target5);
	game.addChild(target5);
	bulletsRemaining = 7;
	updateUI();
}
function createLevel4() {
	clearLevel();
	cannon = new Cannon();
	cannon.x = 100;
	cannon.y = 2400;
	game.addChild(cannon);
	// Circle formation of targets
	var centerX = 1024;
	var centerY = 1800;
	var radius = 300;
	for (var i = 0; i < 6; i++) {
		var angle = i / 6 * 2 * Math.PI;
		var target = new Target();
		target.x = centerX + Math.cos(angle) * radius;
		target.y = centerY + Math.sin(angle) * radius;
		targets.push(target);
		game.addChild(target);
	}
	// Additional center target
	var centerTarget = new Target();
	centerTarget.x = centerX;
	centerTarget.y = centerY;
	targets.push(centerTarget);
	game.addChild(centerTarget);
	bulletsRemaining = 8;
	updateUI();
}
function createLevel5() {
	clearLevel();
	cannon = new Cannon();
	cannon.x = 1700;
	cannon.y = 2500;
	game.addChild(cannon);
	// Zigzag pattern of targets
	var targets_positions = [{
		x: 300,
		y: 2200
	}, {
		x: 600,
		y: 1900
	}, {
		x: 900,
		y: 2100
	}, {
		x: 1200,
		y: 1800
	}, {
		x: 1500,
		y: 2000
	}, {
		x: 400,
		y: 1600
	}, {
		x: 800,
		y: 1400
	}, {
		x: 1100,
		y: 1500
	}, {
		x: 1400,
		y: 1300
	}];
	for (var i = 0; i < targets_positions.length; i++) {
		var target = new Target();
		target.x = targets_positions[i].x;
		target.y = targets_positions[i].y;
		targets.push(target);
		game.addChild(target);
	}
	bulletsRemaining = 10;
	updateUI();
}
function gameOver() {
	LK.effects.flashScreen(0xff0000, 1000);
	LK.setTimeout(function () {
		LK.showGameOver();
	}, 1500);
}
// Touch controls
game.down = function (x, y, obj) {
	if (cannon && bulletsRemaining > 0) {
		cannon.startAiming(x, y);
	}
};
game.move = function (x, y, obj) {
	if (cannon && cannon.isAiming) {
		cannon.updateAim(x, y);
	}
};
game.up = function (x, y, obj) {
	if (cannon && cannon.isAiming) {
		cannon.shoot();
	}
};
game.update = function () {
	// Update all bullets
	for (var i = bullets.length - 1; i >= 0; i--) {
		if (bullets[i] && bullets[i].active) {
			bullets[i].update();
		}
	}
	// Update all targets
	for (var i = 0; i < targets.length; i++) {
		targets[i].update();
	}
};
// Initialize the game
initializeUI();
createLevel1();

===================================================================
--- original.js
+++ change.js
@@ -297,9 +297,9 @@
 function levelComplete() {
 	LK.effects.flashScreen(0x00ff00, 500);
 	LK.setTimeout(function () {
 		currentLevel++;
-		if (currentLevel <= 3) {
+		if (currentLevel <= 5) {
 			createNextLevel();
 		} else {
 			LK.showYouWin();
 		}
@@ -310,8 +310,12 @@
 	if (currentLevel === 2) {
 		createLevel2();
 	} else if (currentLevel === 3) {
 		createLevel3();
+	} else if (currentLevel === 4) {
+		createLevel4();
+	} else if (currentLevel === 5) {
+		createLevel5();
 	}
 }
 function createLevel2() {
 	clearLevel();
@@ -377,8 +381,80 @@
 	game.addChild(target5);
 	bulletsRemaining = 7;
 	updateUI();
 }
+function createLevel4() {
+	clearLevel();
+	cannon = new Cannon();
+	cannon.x = 100;
+	cannon.y = 2400;
+	game.addChild(cannon);
+	// Circle formation of targets
+	var centerX = 1024;
+	var centerY = 1800;
+	var radius = 300;
+	for (var i = 0; i < 6; i++) {
+		var angle = i / 6 * 2 * Math.PI;
+		var target = new Target();
+		target.x = centerX + Math.cos(angle) * radius;
+		target.y = centerY + Math.sin(angle) * radius;
+		targets.push(target);
+		game.addChild(target);
+	}
+	// Additional center target
+	var centerTarget = new Target();
+	centerTarget.x = centerX;
+	centerTarget.y = centerY;
+	targets.push(centerTarget);
+	game.addChild(centerTarget);
+	bulletsRemaining = 8;
+	updateUI();
+}
+function createLevel5() {
+	clearLevel();
+	cannon = new Cannon();
+	cannon.x = 1700;
+	cannon.y = 2500;
+	game.addChild(cannon);
+	// Zigzag pattern of targets
+	var targets_positions = [{
+		x: 300,
+		y: 2200
+	}, {
+		x: 600,
+		y: 1900
+	}, {
+		x: 900,
+		y: 2100
+	}, {
+		x: 1200,
+		y: 1800
+	}, {
+		x: 1500,
+		y: 2000
+	}, {
+		x: 400,
+		y: 1600
+	}, {
+		x: 800,
+		y: 1400
+	}, {
+		x: 1100,
+		y: 1500
+	}, {
+		x: 1400,
+		y: 1300
+	}];
+	for (var i = 0; i < targets_positions.length; i++) {
+		var target = new Target();
+		target.x = targets_positions[i].x;
+		target.y = targets_positions[i].y;
+		targets.push(target);
+		game.addChild(target);
+	}
+	bulletsRemaining = 10;
+	updateUI();
+}
 function gameOver() {
 	LK.effects.flashScreen(0xff0000, 1000);
 	LK.setTimeout(function () {
 		LK.showGameOver();