/**** 
* Classes
****/ 
// Create a Boat class
var Boat = Container.expand(function () {
	var self = Container.call(this);
	var boatGraphics = self.attachAsset('boat', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Set boat speed
	self.speed = -5;
	// This is automatically called every game tick, if the boat is attached!
	self.update = function () {
		// Update score based on distance traveled
		score += Math.abs(self.speed);
		scoreTxt.setText(Math.floor(score));
		// Check if the boat is intersecting with the riverbanks or any obstacle
		if (self.x < 0) {
			self.x = 0;
		} else if (self.x > 2048 - self.width) {
			self.x = 2048 - self.width;
		}
		if (self.y < 0) {
			self.y = 0;
		} else if (self.y > 2732 - self.height) {
			self.y = 2732 - self.height;
		}
		for (var i = 0; i < obstacles.length; i++) {
			if (self.intersects(obstacles[i])) {
				// Show game over. The game will be automatically paused while game over is showing.
				LK.showGameOver();
			}
		}
	};
});
// Create an Obstacle class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Set obstacle speed
	self.speed = 5;
	// This is automatically called every game tick, if the obstacle is attached!
	self.update = function () {
		self.y += self.speed;
		// Destroy the obstacle when it goes off screen
		if (self.y > 2732) {
			self.destroy();
		}
	};
});
// Create a River class
var River = Container.expand(function () {
	var self = Container.call(this);
	// Set initial river speed
	self.speed = 5;
	// Increase river speed over time
	self.update = function () {
		self.y += self.speed;
		self.speed += 0.01; // Increase speed by 0.01 every frame
		// Reset the position of the river to create a loop effect
		if (self.y >= 2732) {
			self.y = 0;
		}
	};
	// This is automatically called every game tick, if the river is attached!
	self.update = function () {
		self.y += self.speed;
		// Reset the position of the river to create a loop effect
		if (self.y >= 2732) {
			self.y = 0;
		}
	};
});
// Create a Riverbank class
var Riverbank = Container.expand(function () {
	var self = Container.call(this);
	var riverbankGraphics = self.attachAsset('riverbank', {
		anchorX: 0.5,
		anchorY: 0.5
	});
});

/**** 
* Initialize Game
****/ 
// Initialize a boat and add it to the game
var game = new LK.Game({
	backgroundColor: 0x0000ff // Change the color to a blue tone to represent a river
});

/**** 
* Game Code
****/ 
// Create a start screen with a 'Tap to Start' button
var startScreen = new Container();
var startText = new Text2('Tap to Start', {
	size: 200,
	fill: 0xFFFFFF
});
startText.anchor.set(0.5, 0.5);
startText.x = 2048 / 2;
startText.y = 2732 / 2;
startScreen.addChild(startText);
game.addChild(startScreen);
game.down = function (x, y, obj) {
	if (startScreen.parent) {
		startScreen.parent.removeChild(startScreen);
		initializeGame();
	}
};
// Function to initialize the game
function initializeGame() {
	// Initialize a river and add it to the game
	var river = game.addChild(LK.getAsset('river', {
		x: 0,
		y: 0
	}));
	var river2 = game.addChild(LK.getAsset('river', {
		x: 0,
		y: -2732
	}));
	// Initialize riverbanks and add them to the game
	var leftRiverbank = game.addChild(new Riverbank());
	leftRiverbank.x = leftRiverbank.width / 2;
	var rightRiverbank = game.addChild(new Riverbank());
	rightRiverbank.x = 2048 - rightRiverbank.width / 2;
	// Initialize score
	var score = 0;
	// Initialize score text
	var scoreTxt = new Text2('0', {
		size: 150,
		fill: 0xFFFFFF
	});
	scoreTxt.anchor.set(0.5, 0);
	LK.gui.top.addChild(scoreTxt);
	// Initialize obstacles array
	var obstacles = [];
	// Initialize a boat and add it to the game
	var boat = game.addChild(new Boat());
	// Position the boat at the bottom center of the screen
	boat.x = 2048 / 2;
	boat.y = 2732 - boat.height / 2;
	// Add swipe controls to move the boat left and right
	var dragNode = null;
	game.down = function (x, y, obj) {
		dragNode = boat;
	};
	game.up = function (x, y, obj) {
		dragNode = null;
	};
	game.move = function (x, y, obj) {
		if (dragNode) {
			// Prevent the boat from moving outside the riverbanks
			var newX = Math.max(leftRiverbank.width + boat.width / 2, Math.min(2048 - rightRiverbank.width - boat.width / 2, x));
			dragNode.x = newX;
		}
	};
	// Initialize obstacles array
	var obstacles = [];
	boat.update = function () {
		boat.y -= river.speed;
		// Check if the boat is intersecting with the riverbanks or any obstacle
		if (boat.intersects(leftRiverbank) || boat.intersects(rightRiverbank)) {
			// Show game over. The game will be automatically paused while game over is showing.
			LK.showGameOver();
		}
		if (typeof obstacles !== 'undefined') {
			for (var i = 0; i < obstacles.length; i++) {
				if (boat.intersects(obstacles[i])) {
					// Show game over. The game will be automatically paused while game over is showing.
					LK.showGameOver();
				}
			}
		}
		// Check if the boat is intersecting with the riverbanks
		if (boat.intersects(leftRiverbank) || boat.intersects(rightRiverbank)) {
			// Show game over. The game will be automatically paused while game over is showing.
			LK.showGameOver();
		}
		// Initialize obstacles array
		var obstacles = [];
		// Update river background position to create a scrolling effect
		river.y += river.speed;
		river2.y += river.speed;
		if (river.y >= 2732) {
			river.y = -2732;
		}
		if (river2.y >= 2732) {
			river2.y = -2732;
		}
		// Generate obstacles
		if (LK.ticks % 60 == 0) {
			// every second
			var obstacle = new Obstacle();
			obstacle.x = Math.random() * (2048 - obstacle.width); // random position in the river
			obstacle.y = -obstacle.height; // start from the top of the screen
			game.addChild(obstacle);
			obstacles.push(obstacle);
		}
	};
}
// Initialize riverbanks and add them to the game
var leftRiverbank = game.addChild(new Riverbank());
leftRiverbank.x = leftRiverbank.width / 2;
var rightRiverbank = game.addChild(new Riverbank());
rightRiverbank.x = 2048 - rightRiverbank.width / 2;
// Initialize score
var score = 0;
// Initialize score text
var scoreTxt = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Initialize obstacles array
var obstacles = [];
// Initialize a boat and add it to the game
var boat = game.addChild(new Boat());
// Position the boat at the bottom center of the screen
boat.x = 2048 / 2;
boat.y = 2732 - boat.height / 2;
// Add swipe controls to move the boat left and right
var dragNode = null;
game.down = function (x, y, obj) {
	dragNode = boat;
};
game.up = function (x, y, obj) {
	dragNode = null;
};
game.move = function (x, y, obj) {
	if (dragNode) {
		// Prevent the boat from moving outside the riverbanks
		var newX = Math.max(leftRiverbank.width + boat.width / 2, Math.min(2048 - rightRiverbank.width - boat.width / 2, x));
		dragNode.x = newX;
	}
};
// Initialize obstacles array
var obstacles = [];
boat.update = function () {
	boat.y -= river.speed;
	// Check if the boat is intersecting with the riverbanks or any obstacle
	if (boat.intersects(leftRiverbank) || boat.intersects(rightRiverbank)) {
		// Show game over. The game will be automatically paused while game over is showing.
		LK.showGameOver();
	}
	if (typeof obstacles !== 'undefined') {
		for (var i = 0; i < obstacles.length; i++) {
			if (boat.intersects(obstacles[i])) {
				// Show game over. The game will be automatically paused while game over is showing.
				LK.showGameOver();
			}
		}
	}
	// Check if the boat is intersecting with the riverbanks
	if (boat.intersects(leftRiverbank) || boat.intersects(rightRiverbank)) {
		// Show game over. The game will be automatically paused while game over is showing.
		LK.showGameOver();
	}
	// Initialize obstacles array
	var obstacles = [];
	// Update river background position to create a scrolling effect
	river.y += river.speed;
	river2.y += river.speed;
	if (river.y >= 2732) {
		river.y = -2732;
	}
	if (river2.y >= 2732) {
		river2.y = -2732;
	}
	// Generate obstacles
	if (LK.ticks % 60 == 0) {
		// every second
		var obstacle = new Obstacle();
		obstacle.x = Math.random() * (2048 - obstacle.width); // random position in the river
		obstacle.y = -obstacle.height; // start from the top of the screen
		game.addChild(obstacle);
		obstacles.push(obstacle);
	}
};

===================================================================
--- original.js
+++ change.js
@@ -94,17 +94,116 @@
 
 /**** 
 * Game Code
 ****/ 
-// Initialize a river and add it to the game
-var river = game.addChild(LK.getAsset('river', {
-	x: 0,
-	y: 0
-}));
-var river2 = game.addChild(LK.getAsset('river', {
-	x: 0,
-	y: -2732
-}));
+// Create a start screen with a 'Tap to Start' button
+var startScreen = new Container();
+var startText = new Text2('Tap to Start', {
+	size: 200,
+	fill: 0xFFFFFF
+});
+startText.anchor.set(0.5, 0.5);
+startText.x = 2048 / 2;
+startText.y = 2732 / 2;
+startScreen.addChild(startText);
+game.addChild(startScreen);
+game.down = function (x, y, obj) {
+	if (startScreen.parent) {
+		startScreen.parent.removeChild(startScreen);
+		initializeGame();
+	}
+};
+// Function to initialize the game
+function initializeGame() {
+	// Initialize a river and add it to the game
+	var river = game.addChild(LK.getAsset('river', {
+		x: 0,
+		y: 0
+	}));
+	var river2 = game.addChild(LK.getAsset('river', {
+		x: 0,
+		y: -2732
+	}));
+	// Initialize riverbanks and add them to the game
+	var leftRiverbank = game.addChild(new Riverbank());
+	leftRiverbank.x = leftRiverbank.width / 2;
+	var rightRiverbank = game.addChild(new Riverbank());
+	rightRiverbank.x = 2048 - rightRiverbank.width / 2;
+	// Initialize score
+	var score = 0;
+	// Initialize score text
+	var scoreTxt = new Text2('0', {
+		size: 150,
+		fill: 0xFFFFFF
+	});
+	scoreTxt.anchor.set(0.5, 0);
+	LK.gui.top.addChild(scoreTxt);
+	// Initialize obstacles array
+	var obstacles = [];
+	// Initialize a boat and add it to the game
+	var boat = game.addChild(new Boat());
+	// Position the boat at the bottom center of the screen
+	boat.x = 2048 / 2;
+	boat.y = 2732 - boat.height / 2;
+	// Add swipe controls to move the boat left and right
+	var dragNode = null;
+	game.down = function (x, y, obj) {
+		dragNode = boat;
+	};
+	game.up = function (x, y, obj) {
+		dragNode = null;
+	};
+	game.move = function (x, y, obj) {
+		if (dragNode) {
+			// Prevent the boat from moving outside the riverbanks
+			var newX = Math.max(leftRiverbank.width + boat.width / 2, Math.min(2048 - rightRiverbank.width - boat.width / 2, x));
+			dragNode.x = newX;
+		}
+	};
+	// Initialize obstacles array
+	var obstacles = [];
+	boat.update = function () {
+		boat.y -= river.speed;
+		// Check if the boat is intersecting with the riverbanks or any obstacle
+		if (boat.intersects(leftRiverbank) || boat.intersects(rightRiverbank)) {
+			// Show game over. The game will be automatically paused while game over is showing.
+			LK.showGameOver();
+		}
+		if (typeof obstacles !== 'undefined') {
+			for (var i = 0; i < obstacles.length; i++) {
+				if (boat.intersects(obstacles[i])) {
+					// Show game over. The game will be automatically paused while game over is showing.
+					LK.showGameOver();
+				}
+			}
+		}
+		// Check if the boat is intersecting with the riverbanks
+		if (boat.intersects(leftRiverbank) || boat.intersects(rightRiverbank)) {
+			// Show game over. The game will be automatically paused while game over is showing.
+			LK.showGameOver();
+		}
+		// Initialize obstacles array
+		var obstacles = [];
+		// Update river background position to create a scrolling effect
+		river.y += river.speed;
+		river2.y += river.speed;
+		if (river.y >= 2732) {
+			river.y = -2732;
+		}
+		if (river2.y >= 2732) {
+			river2.y = -2732;
+		}
+		// Generate obstacles
+		if (LK.ticks % 60 == 0) {
+			// every second
+			var obstacle = new Obstacle();
+			obstacle.x = Math.random() * (2048 - obstacle.width); // random position in the river
+			obstacle.y = -obstacle.height; // start from the top of the screen
+			game.addChild(obstacle);
+			obstacles.push(obstacle);
+		}
+	};
+}
 // Initialize riverbanks and add them to the game
 var leftRiverbank = game.addChild(new Riverbank());
 leftRiverbank.x = leftRiverbank.width / 2;
 var rightRiverbank = game.addChild(new Riverbank());