===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,273 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Enemy = Container.expand(function () {
+	var self = Container.call(this);
+	var enemyGraphics = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 1
+	});
+	self.speed = gameSpeed;
+	self.update = function () {
+		self.x -= self.speed;
+		// Simple enemy animation
+		enemyGraphics.scaleX = 1 + Math.sin(LK.ticks * 0.15) * 0.1;
+		enemyGraphics.scaleY = 1 + Math.sin(LK.ticks * 0.15) * 0.1;
+	};
+	return self;
+});
+var Ground = Container.expand(function () {
+	var self = Container.call(this);
+	var groundGraphics = self.attachAsset('ground', {
+		anchorX: 0,
+		anchorY: 0
+	});
+	self.speed = gameSpeed;
+	self.update = function () {
+		self.x -= self.speed;
+	};
+	return self;
+});
+var Obstacle = Container.expand(function () {
+	var self = Container.call(this);
+	var obstacleGraphics = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 1
+	});
+	self.speed = gameSpeed;
+	self.update = function () {
+		self.x -= self.speed;
+	};
+	return self;
+});
+var Ring = Container.expand(function () {
+	var self = Container.call(this);
+	var ringGraphics = self.attachAsset('ring', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = gameSpeed;
+	self.collected = false;
+	self.update = function () {
+		self.x -= self.speed;
+		// Floating animation
+		ringGraphics.y = Math.sin(LK.ticks * 0.1) * 5;
+		ringGraphics.rotation += 0.1;
+	};
+	return self;
+});
+var Sonic = Container.expand(function () {
+	var self = Container.call(this);
+	var sonicGraphics = self.attachAsset('sonic', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.velocityY = 0;
+	self.isJumping = false;
+	self.groundY = 0;
+	self.jump = function () {
+		if (!self.isJumping) {
+			self.velocityY = -18;
+			self.isJumping = true;
+			LK.getSound('jump').play();
+		}
+	};
+	self.update = function () {
+		// Gravity
+		self.velocityY += 0.8;
+		self.y += self.velocityY;
+		// Check if landed
+		if (self.y >= self.groundY) {
+			self.y = self.groundY;
+			self.velocityY = 0;
+			self.isJumping = false;
+		}
+		// Simple running animation
+		sonicGraphics.rotation += 0.2;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+var gameSpeed = 6;
+var groundLevel = 2400;
+var spawnDistance = 0;
+var distanceScore = 0;
+var speedIncreaseTimer = 0;
+// Game objects arrays
+var groundPieces = [];
+var obstacles = [];
+var rings = [];
+var enemies = [];
+// Create Sonic
+var sonic = game.addChild(new Sonic());
+sonic.x = 300;
+sonic.y = groundLevel - 100;
+sonic.groundY = groundLevel - 100;
+// UI Elements
+var ringScoreText = new Text2('Anillos: 0', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+ringScoreText.anchor.set(0, 0);
+LK.gui.topLeft.addChild(ringScoreText);
+ringScoreText.x = 120;
+ringScoreText.y = 20;
+var distanceText = new Text2('Distancia: 0m', {
+	size: 50,
+	fill: 0xFFFFFF
+});
+distanceText.anchor.set(0.5, 0);
+LK.gui.top.addChild(distanceText);
+distanceText.y = 20;
+// Initialize ground
+for (var i = 0; i < 15; i++) {
+	var ground = game.addChild(new Ground());
+	ground.x = i * 200;
+	ground.y = groundLevel;
+	groundPieces.push(ground);
+}
+// Input handling
+game.down = function (x, y, obj) {
+	sonic.jump();
+};
+function spawnObstacle() {
+	var obstacle = game.addChild(new Obstacle());
+	obstacle.x = 2048 + 100;
+	obstacle.y = groundLevel;
+	obstacles.push(obstacle);
+}
+function spawnRing() {
+	var ring = game.addChild(new Ring());
+	ring.x = 2048 + 100;
+	ring.y = groundLevel - 80 - Math.random() * 120;
+	rings.push(ring);
+}
+function spawnEnemy() {
+	var enemy = game.addChild(new Enemy());
+	enemy.x = 2048 + 100;
+	enemy.y = groundLevel;
+	enemies.push(enemy);
+}
+function updateScore() {
+	ringScoreText.setText('Anillos: ' + LK.getScore());
+	distanceText.setText('Distancia: ' + Math.floor(distanceScore) + 'm');
+}
+game.update = function () {
+	// Update distance score
+	distanceScore += gameSpeed * 0.1;
+	// Increase speed over time
+	speedIncreaseTimer++;
+	if (speedIncreaseTimer >= 300) {
+		// Every 5 seconds
+		gameSpeed += 0.5;
+		speedIncreaseTimer = 0;
+	}
+	// Update spawn distance
+	spawnDistance += gameSpeed;
+	// Spawn objects
+	if (spawnDistance >= 300) {
+		var rand = Math.random();
+		if (rand < 0.3) {
+			spawnObstacle();
+		} else if (rand < 0.6) {
+			spawnRing();
+		} else if (rand < 0.8) {
+			spawnEnemy();
+		}
+		spawnDistance = 0;
+	}
+	// Update ground pieces
+	for (var i = groundPieces.length - 1; i >= 0; i--) {
+		var ground = groundPieces[i];
+		ground.speed = gameSpeed;
+		if (ground.x <= -200) {
+			ground.x = (groundPieces.length - 1) * 200;
+		}
+	}
+	// Update and check obstacles
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obstacle = obstacles[i];
+		obstacle.speed = gameSpeed;
+		if (obstacle.x < -100) {
+			obstacle.destroy();
+			obstacles.splice(i, 1);
+			continue;
+		}
+		// Collision with sonic
+		if (sonic.intersects(obstacle)) {
+			LK.getSound('hit').play();
+			LK.effects.flashScreen(0xFF0000, 1000);
+			LK.showGameOver();
+			return;
+		}
+	}
+	// Update and check rings
+	for (var i = rings.length - 1; i >= 0; i--) {
+		var ring = rings[i];
+		ring.speed = gameSpeed;
+		if (ring.x < -100) {
+			ring.destroy();
+			rings.splice(i, 1);
+			continue;
+		}
+		// Collection check
+		if (!ring.collected && sonic.intersects(ring)) {
+			ring.collected = true;
+			LK.setScore(LK.getScore() + 1);
+			LK.getSound('ring').play();
+			// Ring collection effect
+			tween(ring, {
+				alpha: 0,
+				scaleX: 2,
+				scaleY: 2
+			}, {
+				duration: 300,
+				onFinish: function onFinish() {
+					ring.destroy();
+				}
+			});
+			rings.splice(i, 1);
+		}
+	}
+	// Update and check enemies
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		var enemy = enemies[i];
+		enemy.speed = gameSpeed;
+		if (enemy.x < -100) {
+			enemy.destroy();
+			enemies.splice(i, 1);
+			continue;
+		}
+		// Collision with sonic
+		if (sonic.intersects(enemy)) {
+			LK.getSound('hit').play();
+			LK.effects.flashScreen(0xFF0000, 1000);
+			LK.showGameOver();
+			return;
+		}
+	}
+	// Update UI
+	updateScore();
+	// Win condition - collect 50 rings
+	if (LK.getScore() >= 50) {
+		LK.showYouWin();
+		return;
+	}
+};
+// Start background music
+LK.playMusic('bgmusic');
\ No newline at end of file