===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,261 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+var Boat = Container.expand(function () {
+	var self = Container.call(this);
+	var boatGraphics = self.attachAsset('boat', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.floatSpeed = 1;
+	self.update = function () {
+		self.x += self.floatSpeed;
+		if (self.x > 2048 + 40) {
+			self.x = -40;
+		}
+	};
+	return self;
+});
+var Cloud = Container.expand(function () {
+	var self = Container.call(this);
+	var cloudGraphics = self.attachAsset('cloud', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.driftSpeed = 0.5;
+	self.update = function () {
+		self.x += self.driftSpeed;
+		if (self.x > 2048 + 60) {
+			self.x = -60;
+		}
+	};
+	return self;
+});
+var TrackPiece = Container.expand(function () {
+	var self = Container.call(this);
+	var trackGraphics = self.attachAsset('track', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.isPlaced = false;
+	return self;
+});
+var Train = Container.expand(function () {
+	var self = Container.call(this);
+	var trainGraphics = self.attachAsset('train', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.isMoving = false;
+	self.speed = 3;
+	self.targetX = 0;
+	self.targetY = 0;
+	self.currentTrackIndex = 0;
+	self.down = function (x, y, obj) {
+		if (!self.isMoving && trackPieces.length > 0) {
+			self.isMoving = true;
+			self.currentTrackIndex = 0;
+			self.moveToNextTrack();
+		}
+	};
+	self.moveToNextTrack = function () {
+		if (self.currentTrackIndex < trackPieces.length) {
+			var track = trackPieces[self.currentTrackIndex];
+			self.targetX = track.x;
+			self.targetY = track.y;
+		} else {
+			// Reached the end
+			self.isMoving = false;
+			if (self.targetX >= station.x - 50 && self.targetX <= station.x + 50) {
+				// Reached station
+				LK.effects.flashObject(station, 0x00FF00, 1000);
+				LK.setScore(LK.getScore() + 10);
+				scoreText.setText('Score: ' + LK.getScore());
+			}
+		}
+	};
+	self.update = function () {
+		if (self.isMoving && trackPieces.length > 0) {
+			var dx = self.targetX - self.x;
+			var dy = self.targetY - self.y;
+			var distance = Math.sqrt(dx * dx + dy * dy);
+			if (distance > 5) {
+				self.x += dx / distance * self.speed;
+				self.y += dy / distance * self.speed;
+			} else {
+				self.currentTrackIndex++;
+				self.moveToNextTrack();
+			}
+		}
+	};
+	return self;
+});
+var Whistle = Container.expand(function () {
+	var self = Container.call(this);
+	var whistleGraphics = self.attachAsset('whistle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.down = function (x, y, obj) {
+		LK.getSound('choo').play();
+		tween(self, {
+			scaleX: 1.2,
+			scaleY: 1.2
+		}, {
+			duration: 200
+		});
+		tween(self, {
+			scaleX: 1.0,
+			scaleY: 1.0
+		}, {
+			duration: 200
+		});
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x87CEEB
+});
+
+/**** 
+* Game Code
+****/ 
+var trackPieces = [];
+var clouds = [];
+var boats = [];
+var isBuilding = true;
+var tutorialStep = 0;
+// Create scenery
+var river = game.addChild(LK.getAsset('river', {
+	anchorX: 0,
+	anchorY: 0,
+	x: 0,
+	y: 1800
+}));
+var tunnel = game.addChild(LK.getAsset('tunnel', {
+	anchorX: 0.5,
+	anchorY: 0.5,
+	x: 1024,
+	y: 1200
+}));
+var station = game.addChild(LK.getAsset('station', {
+	anchorX: 0.5,
+	anchorY: 0.5,
+	x: 1700,
+	y: 2400
+}));
+// Create clouds
+for (var i = 0; i < 5; i++) {
+	var cloud = game.addChild(new Cloud());
+	cloud.x = Math.random() * 2048;
+	cloud.y = 200 + Math.random() * 300;
+	cloud.driftSpeed = 0.2 + Math.random() * 0.8;
+	clouds.push(cloud);
+}
+// Create boats
+for (var j = 0; j < 3; j++) {
+	var boat = game.addChild(new Boat());
+	boat.x = Math.random() * 2048;
+	boat.y = 1850;
+	boat.floatSpeed = 0.5 + Math.random() * 1;
+	boats.push(boat);
+}
+// Create train
+var train = game.addChild(new Train());
+train.x = 200;
+train.y = 2200;
+// Create whistle button
+var whistle = game.addChild(new Whistle());
+whistle.x = 150;
+whistle.y = 150;
+// Create UI
+var scoreText = new Text2('Score: 0', {
+	size: 60,
+	fill: 0xFFFFFF
+});
+scoreText.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreText);
+var instructionText = new Text2('Tap to place tracks!', {
+	size: 50,
+	fill: 0xFFFFFF
+});
+instructionText.anchor.set(0.5, 0);
+instructionText.y = 80;
+LK.gui.top.addChild(instructionText);
+var modeText = new Text2('Building Mode', {
+	size: 40,
+	fill: 0xFFFF00
+});
+modeText.anchor.set(0.5, 1);
+LK.gui.bottom.addChild(modeText);
+// Game event handlers
+game.down = function (x, y, obj) {
+	if (isBuilding) {
+		// Place track piece
+		var newTrack = game.addChild(new TrackPiece());
+		newTrack.x = x;
+		newTrack.y = y;
+		newTrack.isPlaced = true;
+		trackPieces.push(newTrack);
+		LK.getSound('place').play();
+		// Update instruction based on progress
+		if (trackPieces.length === 1) {
+			instructionText.setText('Great! Keep building your track!');
+		} else if (trackPieces.length === 5) {
+			instructionText.setText('Tap the train to start its journey!');
+		} else if (trackPieces.length === 10) {
+			instructionText.setText('Build toward the blue station!');
+		}
+		// Check if player has built enough track
+		if (trackPieces.length >= 3) {
+			modeText.setText('Tap train to start journey!');
+		}
+	}
+};
+// Main game loop
+game.update = function () {
+	// Update train movement
+	if (train.isMoving) {
+		// Check if train reached station
+		var distanceToStation = Math.sqrt(Math.pow(train.x - station.x, 2) + Math.pow(train.y - station.y, 2));
+		if (distanceToStation < 100) {
+			train.isMoving = false;
+			LK.effects.flashScreen(0x00FF00, 500);
+			LK.setScore(LK.getScore() + 50);
+			scoreText.setText('Score: ' + LK.getScore());
+			instructionText.setText('Train reached station! Tap to build new track!');
+			// Reset for new round
+			LK.setTimeout(function () {
+				// Clear old tracks
+				for (var i = trackPieces.length - 1; i >= 0; i--) {
+					trackPieces[i].destroy();
+				}
+				trackPieces = [];
+				// Reset train position
+				train.x = 200;
+				train.y = 2200;
+				train.isMoving = false;
+				train.currentTrackIndex = 0;
+				instructionText.setText('Build a new track!');
+				modeText.setText('Building Mode');
+				isBuilding = true;
+			}, 2000);
+		}
+	}
+	// Animate whistle button
+	whistle.y = 150 + Math.sin(LK.ticks * 0.1) * 5;
+	// Update score display
+	if (LK.ticks % 60 === 0) {
+		LK.setScore(LK.getScore() + 1);
+		scoreText.setText('Score: ' + LK.getScore());
+	}
+};
\ No newline at end of file