===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,230 @@
-/****
+/**** 
+* 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: 1.0
+	});
+	self.speed = gameSpeed;
+	self.isDefeated = false;
+	self.defeat = function () {
+		if (!self.isDefeated) {
+			self.isDefeated = true;
+			LK.getSound('defeat').play();
+			LK.setScore(LK.getScore() + 10);
+			scoreTxt.setText(LK.getScore());
+			tween(self, {
+				alpha: 0,
+				scaleY: 0.3
+			}, {
+				duration: 300
+			});
+		}
+	};
+	self.update = function () {
+		self.x -= self.speed;
+	};
+	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;
+		if (self.x <= -self.width) {
+			self.x += self.width * 2;
+		}
+	};
+	return self;
+});
+var Obstacle = Container.expand(function () {
+	var self = Container.call(this);
+	var obstacleGraphics = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.speed = gameSpeed;
+	self.update = function () {
+		self.x -= self.speed;
+	};
+	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.isOnGround = false;
+	self.jumpPower = -25;
+	self.gravity = 1.2;
+	self.groundY = 2500;
+	self.jump = function () {
+		if (self.isOnGround) {
+			self.velocityY = self.jumpPower;
+			self.isOnGround = false;
+			LK.getSound('jump').play();
+		}
+	};
+	self.update = function () {
+		self.velocityY += self.gravity;
+		self.y += self.velocityY;
+		if (self.y >= self.groundY) {
+			self.y = self.groundY;
+			self.velocityY = 0;
+			self.isOnGround = true;
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+var gameSpeed = 8;
+var spawnTimer = 0;
+var speedIncreaseTimer = 0;
+var obstacles = [];
+var enemies = [];
+var groundPieces = [];
+// Create player
+var player = game.addChild(new Player());
+player.x = 300;
+player.y = 2500;
+// Create ground
+for (var i = 0; i < 8; i++) {
+	var groundPiece = game.addChild(new Ground());
+	groundPiece.x = i * 300;
+	groundPiece.y = 2520;
+	groundPieces.push(groundPiece);
+}
+// Create score display
+var scoreTxt = new Text2('0', {
+	size: 80,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+scoreTxt.y = 100;
+// Jump control
+game.down = function (x, y, obj) {
+	player.jump();
+};
+function spawnObstacle() {
+	var obstacle = new Obstacle();
+	obstacle.x = 2200;
+	obstacle.y = 2500;
+	obstacle.speed = gameSpeed;
+	obstacles.push(obstacle);
+	game.addChild(obstacle);
+}
+function spawnEnemy() {
+	var enemy = new Enemy();
+	enemy.x = 2200;
+	enemy.y = 2500;
+	enemy.speed = gameSpeed;
+	enemies.push(enemy);
+	game.addChild(enemy);
+}
+function checkCollisions() {
+	// Check obstacle collisions
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obstacle = obstacles[i];
+		if (player.intersects(obstacle)) {
+			LK.getSound('hit').play();
+			LK.showGameOver();
+			return;
+		}
+	}
+	// Check enemy collisions
+	for (var j = enemies.length - 1; j >= 0; j--) {
+		var enemy = enemies[j];
+		if (player.intersects(enemy) && !enemy.isDefeated) {
+			if (player.velocityY > 0 && player.y < enemy.y - 30) {
+				// Player is falling and above enemy - defeat enemy
+				enemy.defeat();
+				player.velocityY = -15; // Small bounce
+			} else {
+				// Player hit enemy from side or below - game over
+				LK.getSound('hit').play();
+				LK.showGameOver();
+				return;
+			}
+		}
+	}
+}
+function updateGameSpeed() {
+	gameSpeed += 0.003;
+	// Update speed for all moving objects
+	for (var i = 0; i < obstacles.length; i++) {
+		obstacles[i].speed = gameSpeed;
+	}
+	for (var j = 0; j < enemies.length; j++) {
+		enemies[j].speed = gameSpeed;
+	}
+	for (var k = 0; k < groundPieces.length; k++) {
+		groundPieces[k].speed = gameSpeed;
+	}
+}
+function cleanupObjects() {
+	// Remove off-screen obstacles
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		if (obstacles[i].x < -100) {
+			obstacles[i].destroy();
+			obstacles.splice(i, 1);
+		}
+	}
+	// Remove off-screen enemies
+	for (var j = enemies.length - 1; j >= 0; j--) {
+		if (enemies[j].x < -100) {
+			enemies[j].destroy();
+			enemies.splice(j, 1);
+		}
+	}
+}
+game.update = function () {
+	// Spawn objects
+	spawnTimer++;
+	if (spawnTimer >= 90) {
+		if (Math.random() < 0.6) {
+			spawnObstacle();
+		} else {
+			spawnEnemy();
+		}
+		spawnTimer = 0;
+	}
+	// Increase game speed over time
+	speedIncreaseTimer++;
+	if (speedIncreaseTimer >= 300) {
+		updateGameSpeed();
+		speedIncreaseTimer = 0;
+	}
+	// Update score based on survival time
+	if (LK.ticks % 30 === 0) {
+		LK.setScore(LK.getScore() + 1);
+		scoreTxt.setText(LK.getScore());
+	}
+	// Check collisions
+	checkCollisions();
+	// Clean up off-screen objects
+	cleanupObjects();
+};
\ No newline at end of file