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

/**** 
* Classes
****/ 
var Barrier = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('barrier', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	self.update = function () {
		self.x -= gameSpeed;
	};
	return self;
});
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.collected = false;
	self.update = function () {
		self.x -= gameSpeed;
		// Floating animation
		graphics.rotation += 0.1;
		graphics.y = Math.sin(LK.ticks * 0.1) * 10;
	};
	return self;
});
var Platform = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('platform', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.update = function () {
		self.x -= gameSpeed;
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	self.velocityY = 0;
	self.isGrounded = false;
	self.jumpPower = -65;
	self.gravity = 1.2;
	self.maxFallSpeed = 15;
	self.invulnerable = false;
	self.jump = function () {
		if (self.isGrounded) {
			self.velocityY = self.jumpPower;
			self.isGrounded = false;
			LK.getSound('jump').play();
		}
	};
	self.update = function () {
		// Apply gravity
		self.velocityY += self.gravity;
		if (self.velocityY > self.maxFallSpeed) {
			self.velocityY = self.maxFallSpeed;
		}
		// Update position
		self.y += self.velocityY;
		// Check ground collision
		if (self.y >= groundY) {
			self.y = groundY;
			self.velocityY = 0;
			self.isGrounded = true;
		}
		// Animation effect
		graphics.rotation = self.velocityY * 0.02;
	};
	return self;
});
var Spike = Container.expand(function () {
	var self = Container.call(this);
	var graphics = self.attachAsset('spike', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	self.update = function () {
		self.x -= gameSpeed;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Game variables
var gameSpeed = 8;
var baseSpeed = 8;
var maxSpeed = 16;
var speedIncrement = 0.01;
var groundY = 2400;
var spawnTimer = 0;
var distanceScore = 0;
var coinScore = 0;
// Game objects
var player;
var platforms = [];
var spikes = [];
var coins = [];
var barriers = [];
// UI elements
var scoreText = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreText.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreText);
var distanceText = new Text2('Distance: 0m', {
	size: 60,
	fill: 0xFFFFFF
});
distanceText.anchor.set(0, 0);
distanceText.x = 100;
distanceText.y = 150;
LK.gui.topLeft.addChild(distanceText);
// Initialize player
player = game.addChild(new Player());
player.x = 300;
player.y = groundY;
// Create initial platforms
function createPlatform(x, y) {
	var platform = new Platform();
	platform.x = x;
	platform.y = y;
	platforms.push(platform);
	game.addChild(platform);
}
function createSpike(x, y) {
	var spike = new Spike();
	spike.x = x;
	spike.y = y;
	spikes.push(spike);
	game.addChild(spike);
}
function createCoin(x, y) {
	var coin = new Coin();
	coin.x = x;
	coin.y = y;
	coins.push(coin);
	game.addChild(coin);
}
function createBarrier(x, y) {
	var barrier = new Barrier();
	barrier.x = x;
	barrier.y = y;
	barriers.push(barrier);
	game.addChild(barrier);
}
// Spawn obstacles
function spawnObstacles() {
	var spawnX = 2048 + 200;
	var rand = Math.random();
	if (rand < 0.3) {
		// Spike obstacle
		createSpike(spawnX, groundY);
		// Add coin above spike
		if (Math.random() < 0.6) {
			createCoin(spawnX, groundY - 150);
		}
	} else if (rand < 0.6) {
		// Platform obstacle
		var platformY = groundY - 100 - Math.random() * 200;
		createPlatform(spawnX, platformY);
		// Add coin on platform
		if (Math.random() < 0.7) {
			createCoin(spawnX, platformY - 50);
		}
	} else if (rand < 0.8) {
		// Barrier obstacle
		createBarrier(spawnX, groundY);
		// Add coin above barrier
		if (Math.random() < 0.5) {
			createCoin(spawnX, groundY - 200);
		}
	} else {
		// Just coins
		createCoin(spawnX, groundY - 100 - Math.random() * 150);
	}
}
// Check collisions
function checkCollisions() {
	// Check platform collisions for standing
	for (var i = platforms.length - 1; i >= 0; i--) {
		var platform = platforms[i];
		// Check if player is falling onto platform
		if (player.velocityY > 0 && player.intersects(platform)) {
			// Calculate platform top position
			var platformTop = platform.y - 52.7; // Half of platform height
			// Check if player's bottom is near platform top
			if (player.y > platformTop && player.y < platformTop + 20) {
				player.y = platformTop;
				player.velocityY = 0;
				player.isGrounded = true;
			}
		}
	}
	// Check spike collisions
	for (var i = spikes.length - 1; i >= 0; i--) {
		var spike = spikes[i];
		if (player.intersects(spike) && !player.invulnerable) {
			// Hit obstacle
			LK.getSound('hit').play();
			LK.effects.flashScreen(0xff0000, 500);
			LK.showGameOver();
			return;
		}
	}
	// Check barrier collisions
	for (var i = barriers.length - 1; i >= 0; i--) {
		var barrier = barriers[i];
		if (player.intersects(barrier) && !player.invulnerable) {
			// Hit obstacle
			LK.getSound('hit').play();
			LK.effects.flashScreen(0xff0000, 500);
			LK.showGameOver();
			return;
		}
	}
	// Check coin collisions
	for (var i = coins.length - 1; i >= 0; i--) {
		var coin = coins[i];
		if (player.intersects(coin) && !coin.collected) {
			coin.collected = true;
			coinScore += 10;
			LK.setScore(LK.getScore() + 10);
			LK.getSound('coin').play();
			// Coin collection effect
			tween(coin, {
				scaleX: 2,
				scaleY: 2,
				alpha: 0
			}, {
				duration: 300,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					coin.destroy();
					coins.splice(i, 1);
				}
			});
		}
	}
	// Check if player fell off screen
	if (player.y > 2732 + 100) {
		LK.showGameOver();
	}
}
// Clean up off-screen objects
function cleanupObjects() {
	// Clean platforms
	for (var i = platforms.length - 1; i >= 0; i--) {
		if (platforms[i].x < -200) {
			platforms[i].destroy();
			platforms.splice(i, 1);
		}
	}
	// Clean spikes
	for (var i = spikes.length - 1; i >= 0; i--) {
		if (spikes[i].x < -200) {
			spikes[i].destroy();
			spikes.splice(i, 1);
		}
	}
	// Clean coins
	for (var i = coins.length - 1; i >= 0; i--) {
		if (coins[i].x < -200 && !coins[i].collected) {
			coins[i].destroy();
			coins.splice(i, 1);
		}
	}
	// Clean barriers
	for (var i = barriers.length - 1; i >= 0; i--) {
		if (barriers[i].x < -200) {
			barriers[i].destroy();
			barriers.splice(i, 1);
		}
	}
}
// Touch controls
game.down = function (x, y, obj) {
	player.jump();
};
// Main game loop
game.update = function () {
	// Update distance score
	distanceScore += gameSpeed * 0.1;
	LK.setScore(Math.floor(distanceScore) + coinScore);
	// Update UI
	scoreText.setText('Score: ' + LK.getScore());
	distanceText.setText('Distance: ' + Math.floor(distanceScore) + 'm');
	// Increase game speed gradually
	gameSpeed = Math.min(baseSpeed + LK.getScore() * speedIncrement, maxSpeed);
	// Spawn obstacles
	spawnTimer++;
	var spawnRate = Math.max(60 - Math.floor(LK.getScore() * 0.1), 30);
	if (spawnTimer >= spawnRate) {
		spawnObstacles();
		spawnTimer = 0;
	}
	// Check collisions
	checkCollisions();
	// Clean up objects
	cleanupObjects();
};
// Start background music
LK.playMusic('bgmusic');

===================================================================
--- original.js
+++ change.js
@@ -50,9 +50,9 @@
 		anchorY: 1.0
 	});
 	self.velocityY = 0;
 	self.isGrounded = false;
-	self.jumpPower = -50;
+	self.jumpPower = -65;
 	self.gravity = 1.2;
 	self.maxFallSpeed = 15;
 	self.invulnerable = false;
 	self.jump = function () {