===================================================================
--- original.js
+++ change.js
@@ -1,101 +1,120 @@
-/****
+/**** 
 * Classes
 ****/
 var Cactus = Container.expand(function () {
-  var self = Container.call(this);
-  var cactusGraphics = self.attachAsset('cactus', {
-    anchorX: 0.5,
-    anchorY: 1.0
-  });
-  self.move = function () {
-    self.x -= game.speed;
-  };
+	var self = Container.call(this);
+	var cactusGraphics = self.attachAsset('cactus', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.move = function () {
+		self.x -= game.speed;
+	};
 });
 var Dinosaur = Container.expand(function () {
-  var self = Container.call(this);
-  var dinosaurGraphics = self.attachAsset('dinosaur', {
-    anchorX: 0.5,
-    anchorY: 1.0
-  });
-  self.isJumping = false;
-  self.jumpSpeed = 0;
-  self.gravity = 0.5;
-  self.jump = function () {
-    if (!self.isJumping) {
-      self.isJumping = true;
-      self.jumpSpeed = -15;
-    }
-  };
-  self.update = function () {
-    if (self.isJumping) {
-      self.y += self.jumpSpeed;
-      self.jumpSpeed += self.gravity;
-      if (self.y > game.floorLevel) {
-        self.y = game.floorLevel;
-        self.isJumping = false;
-      }
-    }
-  };
+	var self = Container.call(this);
+	var dinosaurGraphics = self.attachAsset('dinosaur', {
+		anchorX: 0.5,
+		anchorY: 1.0
+	});
+	self.isJumping = false;
+	self.jumpSpeed = 0;
+	self.gravity = 0.5;
+	self.jump = function () {
+		if (!self.isJumping && self.y >= game.floorLevel) {
+			self.isJumping = true;
+			self.jumpSpeed = -15;
+		}
+	};
+	self.update = function () {
+		if (self.isJumping) {
+			self.y += self.jumpSpeed;
+			self.jumpSpeed += self.gravity;
+		}
+		if (self.y > game.floorLevel) {
+			self.y = game.floorLevel;
+			self.isJumping = false;
+		}
+	};
 });
+var Ground = Container.expand(function () {
+	var self = Container.call(this);
+	self.attachAsset('ground', {
+		anchorX: 0,
+		anchorY: 1.0
+	});
+	self.move = function () {
+		self.x -= game.speed;
+		if (self.x <= -2048) {
+			self.x = 0;
+		}
+	};
+});
 var Pterodactyl = Container.expand(function () {
-  var self = Container.call(this);
-  var pterodactylGraphics = self.attachAsset('pterodactyl', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.move = function () {
-    self.x -= game.speed;
-  };
+	var self = Container.call(this);
+	var pterodactylGraphics = self.attachAsset('pterodactyl', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.move = function () {
+		self.x -= game.speed;
+	};
 });
 
-/****
+/**** 
 * Initialize Game
 ****/
 var game = new LK.Game({
-  backgroundColor: 0xF0E68C // Desert yellow
+	backgroundColor: 0xF0E68C // Desert yellow
 });
 
-/****
+/**** 
 * Game Code
 ****/
+var ground1 = game.addChild(new Ground());
+var ground2 = game.addChild(new Ground());
+ground2.x = 2048;
 game.speed = 5;
 game.floorLevel = 2732 - 200; // Dinosaur stands on the floor
 game.score = 0;
 game.obstacles = [];
 var dinosaur = game.addChild(new Dinosaur());
 dinosaur.x = 300;
 dinosaur.y = game.floorLevel;
 game.on('down', function () {
-  dinosaur.jump();
+	dinosaur.jump();
 });
 LK.on('tick', function () {
-  dinosaur.update();
-  game.score += 1 / 60; // Add score every tick, 60 ticks per second
-  LK.setScore(Math.floor(game.score)); // Update the score display
-  // Handle obstacles
-  if (LK.ticks % 120 == 0) {
-    // Add a new obstacle every 2 seconds
-    var obstacle;
-    if (Math.random() < 0.5) {
-      obstacle = new Cactus();
-    } else {
-      obstacle = new Pterodactyl();
-      obstacle.y = game.floorLevel - Math.random() * 300 - 150; // Random height for pterodactyl
-    }
-    obstacle.x = 2048;
-    game.obstacles.push(obstacle);
-    game.addChild(obstacle);
-  }
-  for (var i = game.obstacles.length - 1; i >= 0; i--) {
-    game.obstacles[i].move();
-    if (dinosaur.intersects(game.obstacles[i])) {
-      LK.effects.flashScreen(0xff0000, 1000);
-      LK.showGameOver();
-    }
-    if (game.obstacles[i].x < -100) {
-      // Remove off-screen obstacles
-      game.obstacles[i].destroy();
-      game.obstacles.splice(i, 1);
-    }
-  }
+	dinosaur.update();
+	game.score += 1 / 60; // Add score every tick, 60 ticks per second
+	LK.setScore(Math.floor(game.score)); // Update the score display
+	// Move the ground
+	ground1.move();
+	ground2.move();
+	// Handle obstacles
+	if (LK.ticks % 120 == 0) {
+		// Add a new obstacle every 2 seconds
+		var obstacle;
+		if (Math.random() < 0.5) {
+			obstacle = new Cactus();
+		} else {
+			obstacle = new Pterodactyl();
+			obstacle.y = game.floorLevel - Math.random() * 300 - 300; // Random height for pterodactyl
+		}
+		obstacle.x = 2048;
+		game.obstacles.push(obstacle);
+		game.addChild(obstacle);
+	}
+	for (var i = game.obstacles.length - 1; i >= 0; i--) {
+		game.obstacles[i].move();
+		if (dinosaur.intersects(game.obstacles[i])) {
+			LK.effects.flashScreen(0xff0000, 1000);
+			LK.showGameOver();
+		}
+		if (game.obstacles[i].x < -100) {
+			// Remove off-screen obstacles
+			game.obstacles[i].destroy();
+			game.obstacles.splice(i, 1);
+		}
+	}
 });
\ No newline at end of file