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

/**** 
* Classes
****/ 
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coinGraphics = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.collected = false;
	self.update = function () {
		if (!self.collected) {
			coinGraphics.rotation += 0.1;
		}
	};
	return self;
});
var FinishLine = Container.expand(function () {
	var self = Container.call(this);
	var finishGraphics = self.attachAsset('finishLine', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	return self;
});
var Ground = Container.expand(function () {
	var self = Container.call(this);
	var groundGraphics = self.attachAsset('ground', {
		anchorX: 0,
		anchorY: 0
	});
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	self.velocityY = 0;
	self.isGrounded = false;
	self.jumpForce = -20;
	self.gravity = 1.2;
	self.groundY = 0;
	self.isJumping = false;
	self.jump = function () {
		if (self.isGrounded) {
			self.velocityY = self.jumpForce;
			self.isGrounded = false;
			self.isJumping = true;
			LK.getSound('jump').play();
		}
	};
	self.strongJump = function () {
		if (self.isGrounded) {
			self.velocityY = self.jumpForce * 1.5;
			self.isGrounded = false;
			self.isJumping = true;
			LK.getSound('jump').play();
		}
	};
	self.update = function () {
		// Apply gravity
		if (!self.isGrounded) {
			self.velocityY += self.gravity;
		}
		// Update position
		self.y += self.velocityY;
		// Ground collision
		if (self.y >= self.groundY) {
			self.y = self.groundY;
			self.velocityY = 0;
			self.isGrounded = true;
			self.isJumping = false;
		}
	};
	return self;
});
var Spike = Container.expand(function () {
	var self = Container.call(this);
	var spikeGraphics = self.attachAsset('spike', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87ceeb
});

/**** 
* Game Code
****/ 
// Game variables
var player;
var grounds = [];
var spikes = [];
var coins = [];
var finishLine;
var cameraOffsetX = 0;
var gameSpeed = 4;
var currentLevel = storage.currentLevel || 1;
var levelComplete = false;
var isJumpPressed = false;
var jumpHoldTime = 0;
var maxJumpHoldTime = 15;
// UI Elements
var scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0, 0);
scoreTxt.x = 50;
scoreTxt.y = 50;
LK.gui.topLeft.addChild(scoreTxt);
var levelTxt = new Text2('Level: ' + currentLevel, {
	size: 60,
	fill: 0xFFFFFF
});
levelTxt.anchor.set(1, 0);
levelTxt.x = -50;
levelTxt.y = 50;
LK.gui.topRight.addChild(levelTxt);
// Initialize player
player = game.addChild(new Player());
player.x = 300;
player.y = 2200;
player.groundY = 2200;
// Level generation function
function generateLevel() {
	// Clear existing level elements
	for (var i = grounds.length - 1; i >= 0; i--) {
		grounds[i].destroy();
	}
	for (var i = spikes.length - 1; i >= 0; i--) {
		spikes[i].destroy();
	}
	for (var i = coins.length - 1; i >= 0; i--) {
		coins[i].destroy();
	}
	if (finishLine) {
		finishLine.destroy();
	}
	grounds = [];
	spikes = [];
	coins = [];
	// Generate ground platforms
	var groundY = 2300;
	var currentX = 0;
	var levelLength = 3000 + currentLevel * 500;
	while (currentX < levelLength) {
		var ground = game.addChild(new Ground());
		ground.x = currentX;
		ground.y = groundY;
		grounds.push(ground);
		// Add spikes on some platforms
		if (currentX > 500 && Math.random() < 0.3 + currentLevel * 0.1) {
			var spike = game.addChild(new Spike());
			spike.x = currentX + 100 + Math.random() * 100;
			spike.y = groundY;
			spikes.push(spike);
		}
		// Add coins
		if (Math.random() < 0.4) {
			var coin = game.addChild(new Coin());
			coin.x = currentX + 50 + Math.random() * 100;
			coin.y = groundY - 100 - Math.random() * 100;
			coins.push(coin);
		}
		currentX += 150 + Math.random() * 100;
		// Create gaps between platforms
		if (currentX < levelLength - 500 && Math.random() < 0.4) {
			currentX += 150 + Math.random() * 200;
		}
	}
	// Add finish line
	finishLine = game.addChild(new FinishLine());
	finishLine.x = levelLength - 100;
	finishLine.y = groundY;
	// Reset player position
	player.x = 300;
	player.y = 2200;
	player.velocityY = 0;
	player.isGrounded = true;
	cameraOffsetX = 0;
	levelComplete = false;
}
// Input handling
game.down = function (x, y, obj) {
	isJumpPressed = true;
	jumpHoldTime = 0;
};
game.up = function (x, y, obj) {
	if (isJumpPressed) {
		if (jumpHoldTime < 5) {
			player.jump();
		} else {
			player.strongJump();
		}
		isJumpPressed = false;
		jumpHoldTime = 0;
	}
};
// Game update loop
game.update = function () {
	if (levelComplete) return;
	// Handle jump input
	if (isJumpPressed) {
		jumpHoldTime++;
		if (jumpHoldTime >= maxJumpHoldTime) {
			player.strongJump();
			isJumpPressed = false;
			jumpHoldTime = 0;
		}
	}
	// Move player forward automatically
	player.x += gameSpeed;
	// Update camera
	cameraOffsetX = player.x - 400;
	game.x = -cameraOffsetX;
	// Check ground collision
	var onGround = false;
	for (var i = 0; i < grounds.length; i++) {
		var ground = grounds[i];
		if (player.x + 60 > ground.x && player.x - 60 < ground.x + 300 && player.y >= ground.y - 10 && player.y <= ground.y + 75) {
			player.groundY = ground.y;
			onGround = true;
			break;
		}
	}
	if (!onGround) {
		player.groundY = 2800; // Fall into void
	}
	// Check spike collision
	for (var i = 0; i < spikes.length; i++) {
		var spike = spikes[i];
		if (player.intersects(spike)) {
			LK.getSound('death').play();
			LK.effects.flashScreen(0xff0000, 500);
			resetLevel();
			return;
		}
	}
	// Check coin collection
	for (var i = 0; i < coins.length; i++) {
		var coin = coins[i];
		if (!coin.collected && player.intersects(coin)) {
			coin.collected = true;
			coin.alpha = 0;
			LK.setScore(LK.getScore() + 10);
			scoreTxt.setText('Score: ' + LK.getScore());
			LK.getSound('coin').play();
		}
	}
	// Check finish line
	if (finishLine && player.intersects(finishLine)) {
		levelComplete = true;
		currentLevel++;
		storage.currentLevel = currentLevel;
		levelTxt.setText('Level: ' + currentLevel);
		// Flash screen green and generate next level
		LK.effects.flashScreen(0x00ff00, 1000);
		LK.setTimeout(function () {
			generateLevel();
		}, 1000);
	}
	// Check if player fell off the world or fell below ground level
	if (player.y > 2800 || player.y > player.groundY + 100) {
		LK.getSound('death').play();
		LK.effects.flashScreen(0xff0000, 500);
		resetLevel();
	}
};
function resetLevel() {
	LK.setTimeout(function () {
		generateLevel();
	}, 1000);
}
// Initialize first level
generateLevel();

===================================================================
--- original.js
+++ change.js
@@ -231,9 +231,9 @@
 	// Check ground collision
 	var onGround = false;
 	for (var i = 0; i < grounds.length; i++) {
 		var ground = grounds[i];
-		if (player.x + 40 > ground.x && player.x - 40 < ground.x + 200 && player.y >= ground.y - 10 && player.y <= ground.y + 50) {
+		if (player.x + 60 > ground.x && player.x - 60 < ground.x + 300 && player.y >= ground.y - 10 && player.y <= ground.y + 75) {
 			player.groundY = ground.y;
 			onGround = true;
 			break;
 		}