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

/**** 
* Classes
****/ 
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coinGraphics = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = gameSpeed;
	self.collected = false;
	// Floating animation
	self.floatOffset = 0;
	self.update = function () {
		self.x -= self.speed;
		// Floating animation
		self.floatOffset += 0.15;
		coinGraphics.y = Math.sin(self.floatOffset) * 10;
		// Rotation animation
		coinGraphics.rotation += 0.1;
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var foxGraphics = self.attachAsset('fox', {
		anchorX: 0.5,
		anchorY: 1.0
	});
	self.isJumping = false;
	self.velocityY = 0;
	self.groundY = 2732 - 150 - 3; // Ground level
	self.jumpPower = -27;
	self.gravity = 1.2;
	self.runAnimationTimer = 0;
	self.jump = function () {
		if (!self.isJumping) {
			self.isJumping = true;
			self.velocityY = self.jumpPower;
			LK.getSound('jump').play();
			// Jump animation - scale up and rotate slightly
			tween(foxGraphics, {
				scaleX: 1.2,
				scaleY: 1.2,
				rotation: -0.3
			}, {
				duration: 200,
				easing: tween.easeOut,
				onFinish: function onFinish() {
					tween(foxGraphics, {
						scaleX: 1.0,
						scaleY: 1.0,
						rotation: 0
					}, {
						duration: 300,
						easing: tween.easeIn
					});
				}
			});
		}
	};
	self.update = function () {
		if (self.isJumping) {
			self.velocityY += self.gravity;
			self.y += self.velocityY;
			// Land on ground
			if (self.y >= self.groundY) {
				self.y = self.groundY;
				self.isJumping = false;
				self.velocityY = 0;
			}
		} else {
			// Running animation when on ground
			self.runAnimationTimer += 0.2;
			foxGraphics.y = Math.sin(self.runAnimationTimer) * 3;
			foxGraphics.scaleX = 1.0 + Math.sin(self.runAnimationTimer * 2) * 0.05;
		}
	};
	return self;
});
var Trail = Container.expand(function () {
	var self = Container.call(this);
	var trailGraphics = self.attachAsset('fox', {
		anchorX: 0.5,
		anchorY: 1.0,
		scaleX: 0.6,
		scaleY: 0.6,
		alpha: 0.7
	});
	self.speed = gameSpeed;
	self.update = function () {
		self.x -= self.speed;
	};
	return self;
});

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

/**** 
* Game Code
****/ 
var player;
var coins = [];
var trails = [];
var gameSpeed = 8;
var spawnTimer = 0;
var coinCount = 0;
var distanceScore = 0;
var groundY = 2732 - 150;
var playerLives = 3;
var trailTimer = 0;
var background1, background2;
// UI Elements
var coinIcon = LK.getAsset('coin_icon', {
	anchorX: 0.5,
	anchorY: 0,
	x: 0,
	y: 20
});
LK.gui.top.addChild(coinIcon);
var coinText = new Text2('0', {
	size: 90,
	fill: 0xFFFFFF
});
coinText.anchor.set(0.5, 0);
coinText.x = 0;
coinText.y = 110;
LK.gui.top.addChild(coinText);
var scoreText = new Text2('Distance: 0', {
	size: 90,
	fill: 0xFFFFFF
});
scoreText.anchor.set(1, 0);
LK.gui.topRight.addChild(scoreText);
// Create heart UI elements
var hearts = [];
for (var h = 0; h < 3; h++) {
	var heart = LK.getAsset('heart', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 120 + h * 105,
		y: 120
	});
	hearts.push(heart);
	LK.gui.topLeft.addChild(heart);
}
// Create endless scrolling background
background1 = game.addChild(LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: 0
}));
background2 = game.addChild(LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0,
	x: 2048,
	y: 0
}));
// Create animated ground elements for endless scrolling
var ground1 = game.addChild(LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0,
	x: 0,
	y: groundY
}));
var ground2 = game.addChild(LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0,
	x: 4008,
	// Position second ground at end of first ground
	y: groundY
}));
// Ground animation variables
var groundAnimationTimer = 0;
// Create player (will be added to foreground later)
player = new Player();
player.x = 400;
player.y = groundY - 3;
player.isInvulnerable = false;
// Touch controls
game.down = function (x, y, obj) {
	player.jump();
};
function spawnCoin() {
	var coin = new Coin();
	coin.x = 2048 + 100;
	coin.y = groundY - 100 - Math.random() * 150;
	coins.push(coin);
	game.addChild(coin);
}
game.update = function () {
	// Increase distance score
	distanceScore += 1;
	scoreText.setText('Distance: ' + Math.floor(distanceScore / 10));
	// Gradually increase speed
	gameSpeed = 8 + distanceScore / 2000;
	// Move background with game progression
	background1.x -= gameSpeed * 0.3; // Slower parallax effect
	background2.x -= gameSpeed * 0.3;
	// Reset background positions for endless scrolling
	if (background1.x <= -2048) {
		background1.x = background2.x + 2048;
	}
	if (background2.x <= -2048) {
		background2.x = background1.x + 2048;
	}
	// Move both ground elements with game progression
	ground1.x -= gameSpeed;
	ground2.x -= gameSpeed;
	// Reset ground positions for endless scrolling
	if (ground1.x <= -4008) {
		ground1.x = ground2.x + 4008;
	}
	if (ground2.x <= -4008) {
		ground2.x = ground1.x + 4008;
	}
	// Animate ground with subtle movement
	groundAnimationTimer += 0.1;
	var groundOffset = Math.sin(groundAnimationTimer) * 2;
	ground1.y = groundY + groundOffset;
	ground2.y = groundY + groundOffset;
	// Add slight scale animation to ground
	var scaleAnimation = 1.0 + Math.sin(groundAnimationTimer * 0.5) * 0.02;
	ground1.scaleY = scaleAnimation;
	ground2.scaleY = scaleAnimation;
	// Update spawn timer
	spawnTimer++;
	trailTimer++;
	// Create trail when player is jumping
	if (player.isJumping && trailTimer % 3 == 0) {
		var trail = new Trail();
		trail.x = player.x;
		trail.y = player.y;
		trail.speed = gameSpeed;
		trails.push(trail);
		game.addChild(trail);
		// Fade out trail
		tween(trail, {
			alpha: 0,
			scaleX: 0.3,
			scaleY: 0.3
		}, {
			duration: 500,
			onFinish: function onFinish() {
				trail.destroy();
			}
		});
	}
	// Spawn additional coins
	if (spawnTimer % 60 == 0 && Math.random() < 0.8) {
		spawnCoin();
	}
	// Update and check coins
	for (var j = coins.length - 1; j >= 0; j--) {
		var coin = coins[j];
		coin.speed = gameSpeed;
		// Check collection
		if (!coin.collected && player.intersects(coin)) {
			coin.collected = true;
			coinCount++;
			LK.setScore(coinCount);
			coinText.setText(coinCount);
			LK.getSound('coin').play();
			// Visual feedback
			LK.effects.flashObject(coin, 0xFFFFFF, 300);
			tween(coin, {
				alpha: 0,
				scaleX: 2,
				scaleY: 2
			}, {
				duration: 300,
				onFinish: function onFinish() {
					coin.destroy();
				}
			});
			coins.splice(j, 1);
			continue;
		}
		// Remove off-screen coins
		if (coin.x < -50) {
			coin.destroy();
			coins.splice(j, 1);
		}
	}
	// Update and clean up trails
	for (var k = trails.length - 1; k >= 0; k--) {
		var trail = trails[k];
		trail.speed = gameSpeed;
		// Remove off-screen or completely faded trails
		if (trail.x < -100 || trail.alpha <= 0.1) {
			trail.destroy();
			trails.splice(k, 1);
		}
	}
	// Ensure player stays in foreground by re-adding it
	if (player.parent !== game) {
		game.addChild(player);
	} else {
		// Move player to top of render order
		game.removeChild(player);
		game.addChild(player);
	}
};

===================================================================
--- original.js
+++ change.js
@@ -33,9 +33,9 @@
 		anchorY: 1.0
 	});
 	self.isJumping = false;
 	self.velocityY = 0;
-	self.groundY = 2732 - 149 - 3; // Ground level
+	self.groundY = 2732 - 150 - 3; // Ground level
 	self.jumpPower = -27;
 	self.gravity = 1.2;
 	self.runAnimationTimer = 0;
 	self.jump = function () {
@@ -115,9 +115,9 @@
 var gameSpeed = 8;
 var spawnTimer = 0;
 var coinCount = 0;
 var distanceScore = 0;
-var groundY = 2732 - 149;
+var groundY = 2732 - 150;
 var playerLives = 3;
 var trailTimer = 0;
 var background1, background2;
 // UI Elements