/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1");

/**** 
* Classes
****/ 
var Ball = Container.expand(function () {
	var self = Container.call(this);
	var ballSprite = self.attachAsset('ball', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = ballSprite.width / 2;
	self.velocity = {
		x: 7,
		y: -15
	};
	self.gravity = 0.5;
	self.bounce = 0.8;
	self.isAlive = true;
	self.isPoweredUp = false;
	self.update = function () {
		if (!self.isAlive) {
			return;
		}
		// Apply gravity
		self.velocity.y += self.gravity;
		// Move based on velocity
		self.x += self.velocity.x;
		self.y += self.velocity.y;
		// Bounce off walls
		if (self.x < self.radius) {
			self.x = self.radius;
			self.velocity.x = Math.abs(self.velocity.x);
		} else if (self.x > 2048 - self.radius) {
			self.x = 2048 - self.radius;
			self.velocity.x = -Math.abs(self.velocity.x);
		}
		// Bounce off ground
		if (self.y > 2732 - 100 - self.radius) {
			self.y = 2732 - 100 - self.radius;
			self.velocity.y = -Math.abs(self.velocity.y * self.bounce);
			LK.getSound('bounce').play();
		}
		// Bounce off ceiling
		if (self.y < self.radius) {
			self.y = self.radius;
			self.velocity.y = Math.abs(self.velocity.y * self.bounce);
			LK.getSound('bounce').play();
		}
	};
	self.changeDirection = function () {
		if (!self.isAlive) {
			return;
		}
		// Reverse horizontal direction on tap
		self.velocity.x = -self.velocity.x;
	};
	self.activatePowerUp = function (type) {
		self.isPoweredUp = true;
		// Different power-up effects
		if (type === "slow") {
			var originalVelocityX = self.velocity.x;
			var originalVelocityY = self.velocity.y;
			var originalGravity = self.gravity;
			// Slow down
			self.velocity.x *= 0.5;
			self.velocity.y *= 0.5;
			self.gravity *= 0.5;
			// Flash the ball to indicate power-up
			tween(ballSprite, {
				tint: 0x00FFFF
			}, {
				duration: 300,
				easing: tween.linear
			});
			// Reset after 5 seconds
			LK.setTimeout(function () {
				self.velocity.x = originalVelocityX;
				self.velocity.y = originalVelocityY;
				self.gravity = originalGravity;
				self.isPoweredUp = false;
				tween(ballSprite, {
					tint: 0xFFFFFF
				}, {
					duration: 300,
					easing: tween.linear
				});
			}, 5000);
		} else if (type === "small") {
			var originalRadius = self.radius;
			// Shrink the ball
			tween(ballSprite, {
				scale: 0.5
			}, {
				duration: 300,
				easing: tween.easeOut
			});
			self.radius *= 0.5;
			// Flash the ball to indicate power-up
			tween(ballSprite, {
				tint: 0xFF00FF
			}, {
				duration: 300,
				easing: tween.linear
			});
			// Reset after 5 seconds
			LK.setTimeout(function () {
				tween(ballSprite, {
					scale: 1
				}, {
					duration: 300,
					easing: tween.easeOut
				});
				self.radius = originalRadius;
				self.isPoweredUp = false;
				tween(ballSprite, {
					tint: 0xFFFFFF
				}, {
					duration: 300,
					easing: tween.linear
				});
			}, 5000);
		}
	};
	return self;
});
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleSprite = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.width = obstacleSprite.width;
	self.height = obstacleSprite.height;
	self.speed = 5;
	self.update = function () {
		self.x -= self.speed;
		// Remove if off screen
		if (self.x < -self.width) {
			self.shouldRemove = true;
		}
	};
	self.setSpeed = function (newSpeed) {
		self.speed = newSpeed;
	};
	return self;
});
var PowerUp = Container.expand(function () {
	var self = Container.call(this);
	var powerupSprite = self.attachAsset('powerup', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.radius = powerupSprite.width / 2;
	self.speed = 5;
	self.type = Math.random() < 0.5 ? "slow" : "small";
	// Set color based on type
	if (self.type === "slow") {
		powerupSprite.tint = 0x00FFFF; // Cyan for slow time
	} else {
		powerupSprite.tint = 0xFF00FF; // Magenta for shrink
	}
	self.update = function () {
		self.x -= self.speed;
		// Spin effect
		powerupSprite.rotation += 0.05;
		// Remove if off screen
		if (self.x < -self.radius * 2) {
			self.shouldRemove = true;
		}
	};
	self.setSpeed = function (newSpeed) {
		self.speed = newSpeed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB
});

/**** 
* Game Code
****/ 
// Game variables
var obstacles = [];
var powerups = [];
var obstacleSpawnTimer = null;
var powerupSpawnTimer = null;
var gameSpeed = 5;
var spawnRate = 2000;
var score = 0;
var difficultyTimer = null;
var isGameActive = false;
// Create background
var background = game.addChild(LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
}));
// Create ground
var ground = game.addChild(LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 2732 - 100
}));
// Create ball
var ball = game.addChild(new Ball());
ball.x = 300;
ball.y = 500;
// Create score text
var scoreTxt = new Text2('Score: 0', {
	size: 70,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
scoreTxt.y = 50;
// Create high score text
var highScore = storage.highScore || 0;
var highScoreTxt = new Text2('Best: ' + highScore, {
	size: 50,
	fill: 0xFFFFFF
});
highScoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(highScoreTxt);
highScoreTxt.y = 130;
// Start message
var tapToStartTxt = new Text2('Tap to Start', {
	size: 100,
	fill: 0xFFFFFF
});
tapToStartTxt.anchor.set(0.5, 0.5);
LK.gui.center.addChild(tapToStartTxt);
// Game functions
function startGame() {
	if (isGameActive) {
		return;
	}
	isGameActive = true;
	score = 0;
	gameSpeed = 5;
	scoreTxt.setText('Score: 0');
	// Remove start message
	LK.gui.center.removeChild(tapToStartTxt);
	// Reset the ball
	ball.x = 300;
	ball.y = 500;
	ball.velocity = {
		x: 7,
		y: -15
	};
	ball.isAlive = true;
	// Clear existing obstacles and powerups
	for (var i = obstacles.length - 1; i >= 0; i--) {
		game.removeChild(obstacles[i]);
	}
	obstacles = [];
	for (var i = powerups.length - 1; i >= 0; i--) {
		game.removeChild(powerups[i]);
	}
	powerups = [];
	// Start obstacle spawning
	spawnRate = 2000;
	obstacleSpawnTimer = LK.setInterval(spawnObstacle, spawnRate);
	// Start power-up spawning (less frequent)
	powerupSpawnTimer = LK.setInterval(spawnPowerUp, 7000);
	// Increase difficulty over time
	difficultyTimer = LK.setInterval(increaseDifficulty, 10000);
	// Play background music
	LK.playMusic('gameMusic', {
		fade: {
			start: 0,
			end: 0.4,
			duration: 1000
		}
	});
}
function gameOver() {
	isGameActive = false;
	ball.isAlive = false;
	// Play crash sound
	LK.getSound('crash').play();
	// Flash screen red
	LK.effects.flashScreen(0xFF0000, 500);
	// Stop spawning
	LK.clearInterval(obstacleSpawnTimer);
	LK.clearInterval(powerupSpawnTimer);
	LK.clearInterval(difficultyTimer);
	// Update high score if needed
	if (score > highScore) {
		highScore = score;
		storage.highScore = highScore;
		highScoreTxt.setText('Best: ' + highScore);
	}
	// Show game over
	LK.showGameOver();
}
function spawnObstacle() {
	if (!isGameActive) {
		return;
	}
	var obstacle = new Obstacle();
	// Random height
	var height = 200 + Math.random() * 300;
	obstacle.getChildAt(0).height = height;
	obstacle.height = height;
	// Position at right side of screen
	obstacle.x = 2048 + obstacle.width / 2;
	// Random vertical position, but ensure gap for player
	var minY = 150;
	var maxY = 2732 - 100 - 150 - height;
	obstacle.y = minY + Math.random() * (maxY - minY);
	// Set speed
	obstacle.setSpeed(gameSpeed);
	// Add to game
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
function spawnPowerUp() {
	if (!isGameActive) {
		return;
	}
	var powerup = new PowerUp();
	// Position at right side of screen
	powerup.x = 2048 + powerup.radius;
	// Random vertical position
	powerup.y = 150 + Math.random() * (2732 - 350);
	// Set speed
	powerup.setSpeed(gameSpeed);
	// Add to game
	powerups.push(powerup);
	game.addChild(powerup);
}
function increaseDifficulty() {
	if (!isGameActive) {
		return;
	}
	// Increase game speed
	gameSpeed += 0.5;
	// Update existing obstacles and powerups
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].setSpeed(gameSpeed);
	}
	for (var i = 0; i < powerups.length; i++) {
		powerups[i].setSpeed(gameSpeed);
	}
	// Decrease spawn rate (but not below 1000ms)
	spawnRate = Math.max(1000, spawnRate - 100);
	// Clear and reset obstacle spawn timer with new rate
	LK.clearInterval(obstacleSpawnTimer);
	obstacleSpawnTimer = LK.setInterval(spawnObstacle, spawnRate);
}
function checkCollisions() {
	if (!ball.isAlive) {
		return;
	}
	// Check obstacle collisions
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		// Simple rectangle collision detection
		var ballLeft = ball.x - ball.radius;
		var ballRight = ball.x + ball.radius;
		var ballTop = ball.y - ball.radius;
		var ballBottom = ball.y + ball.radius;
		var obstacleLeft = obstacle.x - obstacle.width / 2;
		var obstacleRight = obstacle.x + obstacle.width / 2;
		var obstacleTop = obstacle.y - obstacle.height / 2;
		var obstacleBottom = obstacle.y + obstacle.height / 2;
		if (ballRight > obstacleLeft && ballLeft < obstacleRight && ballBottom > obstacleTop && ballTop < obstacleBottom) {
			// If powered up with "small", do more precise collision detection
			if (ball.isPoweredUp && ball.radius < 25) {
				// More precise circle-rectangle collision
				var closestX = Math.max(obstacleLeft, Math.min(ball.x, obstacleRight));
				var closestY = Math.max(obstacleTop, Math.min(ball.y, obstacleBottom));
				var distanceX = ball.x - closestX;
				var distanceY = ball.y - closestY;
				var distanceSquared = distanceX * distanceX + distanceY * distanceY;
				if (distanceSquared < ball.radius * ball.radius) {
					gameOver();
					return;
				}
			} else {
				gameOver();
				return;
			}
		}
	}
	// Check powerup collisions
	for (var i = powerups.length - 1; i >= 0; i--) {
		var powerup = powerups[i];
		// Simple circle collision detection
		var dx = ball.x - powerup.x;
		var dy = ball.y - powerup.y;
		var distance = Math.sqrt(dx * dx + dy * dy);
		if (distance < ball.radius + powerup.radius) {
			// Collect powerup
			LK.getSound('collect').play();
			// Apply powerup effect
			ball.activatePowerUp(powerup.type);
			// Remove powerup
			game.removeChild(powerup);
			powerups.splice(i, 1);
			// Add score
			score += 10;
			scoreTxt.setText('Score: ' + score);
		}
	}
}
function updateGame() {
	if (!isGameActive) {
		return;
	}
	// Update obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		if (obstacles[i].shouldRemove) {
			game.removeChild(obstacles[i]);
			obstacles.splice(i, 1);
			// Increment score when passing an obstacle
			score += 1;
			scoreTxt.setText('Score: ' + score);
			continue;
		}
	}
	// Update powerups
	for (var i = powerups.length - 1; i >= 0; i--) {
		if (powerups[i].shouldRemove) {
			game.removeChild(powerups[i]);
			powerups.splice(i, 1);
		}
	}
	// Check for collisions
	checkCollisions();
}
// Event handlers
game.down = function (x, y, obj) {
	if (!isGameActive) {
		startGame();
	} else {
		if (obj.event && obj.event.detail && obj.event.detail === 2) {
			// Check for double tap
			ball.velocity.y = -Math.abs(ball.velocity.y * ball.bounce); // Bounce in the air
			LK.getSound('bounce').play();
		} else {
			ball.changeDirection();
		}
	}
};
// Main update function
game.update = function () {
	updateGame();
};

===================================================================
--- original.js
+++ change.js
@@ -445,9 +445,9 @@
 game.down = function (x, y, obj) {
 	if (!isGameActive) {
 		startGame();
 	} else {
-		if (obj.event && obj.event.detail === 2) {
+		if (obj.event && obj.event.detail && obj.event.detail === 2) {
 			// Check for double tap
 			ball.velocity.y = -Math.abs(ball.velocity.y * ball.bounce); // Bounce in the air
 			LK.getSound('bounce').play();
 		} else {