/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");

/**** 
* Classes
****/ 
//<Assets used in the game will automatically appear here>
// AnimatedBug class to represent the bug that flies to the top of the screen
var AnimatedBug = Container.expand(function () {
	var self = Container.call(this);
	var bugGraphics = self.attachAsset('bug', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.update = function () {
		// Determine the direction to fly to (left or right)
		var direction = Math.random() < 0.5 ? -1 : 1;
		// Update the x and y position
		self.x += self.speed * direction * 3;
		self.y -= self.speed * 3;
		// Destroy the bug when it flies off the screen
		if (self.y < 0 || self.x < 0 || self.x > 2048) {
			self.destroy();
		}
	};
});
var Bug = Container.expand(function () {
	var self = Container.call(this);
	var bugGraphics = self.attachAsset('bug', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.update = function () {
		self.y += self.speed;
	};
	self.down = function (x, y, obj) {
		// Increment score
		LK.setScore(LK.getScore() + 1);
		// Update score text
		scoreTxt.setText('Score: ' + LK.getScore());
		// Replace bug with AnimatedBug
		var animatedBug = game.addChild(new AnimatedBug());
		animatedBug.x = self.x;
		animatedBug.y = self.y;
		isTouching = false; // Prevent car from moving when touching a bug
		self.destroy();
	};
});
// FastBug class to represent the fast bug that scrolls down the screen
var FastBug = Container.expand(function () {
	var self = Container.call(this);
	var bugGraphics = self.attachAsset('fastBug', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.update = function () {
		self.y += self.speed;
	};
	self.down = function (x, y, obj) {
		// Increment score
		LK.setScore(LK.getScore() + 1);
		// Update score text
		scoreTxt.setText('Score: ' + LK.getScore());
		// Replace bug with AnimatedBug
		var animatedBug = game.addChild(new AnimatedBug());
		animatedBug.x = self.x;
		animatedBug.y = self.y;
		isTouching = false; // Prevent car from moving when touching a bug
		self.destroy();
	};
});
// GrassStripe class for representing the scrolling grass stripes
var GrassStripe = Container.expand(function () {
	var self = Container.call(this);
	self.isDark = false; // Track if this is a dark stripe
	var stripeGraphics = self.attachAsset('grassStripe', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Set speed of scrolling
	self.speed = 5;
	// Method to toggle between light and dark stripe
	self.setDark = function (isDark) {
		self.isDark = isDark;
		if (isDark) {
			stripeGraphics = self.attachAsset('grassStripeDark', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		} else {
			stripeGraphics = self.attachAsset('grassStripe', {
				anchorX: 0.5,
				anchorY: 0.5
			});
		}
	};
	self.update = function () {
		self.y += self.speed;
		// If stripe moves off screen, reset to top
		if (self.y > 2732 + self.height / 2) {
			self.y = -self.height / 2;
		}
	};
	return self;
});
// Jeep class to represent the player's vehicle
var Jeep = Container.expand(function () {
	var self = Container.call(this);
	var jeepGraphics = self.attachAsset('jeep', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 10;
	self.update = function () {
		var dx = targetPosition.x - self.x;
		// Only update x position, ignore vertical movement
		self.x += self.speed * (dx > 0 ? 1 : dx < 0 ? -1 : 0);
		// Keep y position fixed
		self.y = 2732 - 200; // Fixed position at bottom of screen
	};
});
var Tree = Container.expand(function () {
	var self = Container.call(this);
	var treeGraphics = self.attachAsset('tree', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	// Create a trunk hit box for collision detection
	self.trunkWidth = 60; // width of trunk collision area
	self.trunkHeight = 200; // height of trunk collision area
	self.trunkOffsetY = 50; // offset from center of tree
	// Check if point is within the trunk area
	self.trunkIntersects = function (obj) {
		// Calculate trunk boundaries
		var trunkLeft = self.x - self.trunkWidth / 2;
		var trunkRight = self.x + self.trunkWidth / 2;
		var trunkTop = self.y + self.trunkOffsetY - self.trunkHeight / 2;
		var trunkBottom = self.y + self.trunkOffsetY + self.trunkHeight / 2;
		// Get object boundaries
		var objLeft = obj.x - obj.width / 2;
		var objRight = obj.x + obj.width / 2;
		var objTop = obj.y - obj.height / 2;
		var objBottom = obj.y + obj.height / 2;
		// Check for intersection
		return !(objRight < trunkLeft || objLeft > trunkRight || objBottom < trunkTop || objTop > trunkBottom);
	};
	self.update = function () {
		self.y += self.speed;
	};
});

/**** 
* Initialize Game
****/ 
// Helper function to swap children in display list
var game = new LK.Game({
	backgroundColor: 0x006400 //Init game with darker green background
});

/**** 
* Game Code
****/ 
// Helper function to swap children in display list
// Initialize game variables
function swapChildren(parent, child1, child2) {
	if (!parent || !child1 || !child2) return;
	// Get the index of both children
	var index1 = -1;
	var index2 = -1;
	for (var i = 0; i < parent.children.length; i++) {
		if (parent.children[i] === child1) {
			index1 = i;
		}
		if (parent.children[i] === child2) {
			index2 = i;
		}
	}
	// If both children are found, swap them
	if (index1 !== -1 && index2 !== -1) {
		// Remove both children (higher index first to not affect the lower index)
		var temp;
		if (index1 > index2) {
			temp = parent.removeChildAt(index1);
			parent.addChildAt(temp, index2);
		} else {
			temp = parent.removeChildAt(index2);
			parent.addChildAt(temp, index1);
		}
	}
}
var jeep;
var scoreTxt;
var deathReasonTxt;
var deathReason = "";
var isTouching = false;
var grassStripes = [];
// Function to create scrolling grass stripes
function createGrassStripes() {
	// Clear existing stripes if any
	for (var i = 0; i < grassStripes.length; i++) {
		if (grassStripes[i]) {
			grassStripes[i].destroy();
		}
	}
	grassStripes = [];
	// Create new stripes to fill the screen
	var stripeHeight = 200;
	var numStripes = Math.ceil(2732 / stripeHeight) + 1; // +1 for seamless scrolling
	for (var i = 0; i < numStripes; i++) {
		var stripe = new GrassStripe();
		stripe.x = 2048 / 2;
		stripe.y = i * stripeHeight;
		stripe.setDark(i % 2 === 0); // Alternate between light and dark
		grassStripes.push(stripe);
		game.addChild(stripe);
		// Make sure stripes are added at the bottom of the display list (background)
		swapChildren(game, stripe, game.getChildAt(0));
	}
}
// Function to initialize game elements
function initGame() {
	// Initialize grass stripes
	createGrassStripes();
	// Create and position the Jeep
	jeep = game.addChild(new Jeep());
	jeep.x = 2048 / 2;
	jeep.y = 2732 - 200;
	targetPosition.x = jeep.x;
	targetPosition.y = jeep.y;
	// Initialize score display
	scoreTxt = new Text2('Score: 0', {
		size: 100,
		fill: 0xFFFFFF
	});
	// Initialize death reason display
	deathReasonTxt = new Text2('', {
		size: 80,
		fill: 0xFFFFFF
	});
	// Initialize bugs, fastBugs and trees arrays
	bugs = [];
	fastBugs = [];
	trees = [];
	scoreTxt.anchor.set(0.5, 0);
	deathReasonTxt.anchor.set(0.5, 0);
	deathReasonTxt.y = 120; // Position below score text
	LK.gui.top.addChild(scoreTxt);
	LK.gui.top.addChild(deathReasonTxt);
}
var targetPosition = {
	x: 0,
	y: 0
};
game.down = function (x, y, obj) {
	// Check if the touch is on a bug, if so ignore and return
	for (var i = 0; i < bugs.length; i++) {
		if (x >= bugs[i].x - 100 && x <= bugs[i].x + 100 && y >= bugs[i].y - 100 && y <= bugs[i].y + 100) {
			return;
		}
	}
	// Check if the touch is on a fast bug, if so ignore and return
	for (var i = 0; i < fastBugs.length; i++) {
		if (x >= fastBugs[i].x - 100 && x <= fastBugs[i].x + 100 && y >= fastBugs[i].y - 100 && y <= fastBugs[i].y + 100) {
			return;
		}
	}
	// Set target position for the jeep movement (horizontal only)
	targetPosition.x = x;
	// Keep targetPosition.y fixed to maintain jeep's vertical position
	targetPosition.y = 2732 - 200;
};
game.update = function () {
	// Update grass stripes
	for (var i = 0; i < grassStripes.length; i++) {
		grassStripes[i].update();
	}
	jeep.update();
	// Bug and tree spawning logic
	if (LK.ticks % 60 == 0) {
		var newBug = new Bug();
		newBug.x = Math.random() * 2048;
		newBug.y = 0;
		bugs.push(newBug);
		game.addChild(newBug);
	}
	if (LK.ticks % 180 == 0) {
		var newFastBug = new FastBug();
		newFastBug.x = Math.random() * 2048;
		newFastBug.y = 0;
		fastBugs.push(newFastBug);
		game.addChild(newFastBug);
	}
	if (LK.ticks % 180 == 0) {
		var newTree = new Tree();
		newTree.x = Math.random() * 2048;
		newTree.y = 0;
		trees.push(newTree);
		game.addChild(newTree);
	}
	// Bug and tree movement and collision detection logic
	for (var i = bugs.length - 1; i >= 0; i--) {
		bugs[i].update();
		// Only check collision if it's not an AnimatedBug
		if (bugs[i].intersects(jeep) && !(bugs[i] instanceof AnimatedBug)) {
			deathReason = "Hit by a bug!";
			deathReasonTxt.setText(deathReason);
			LK.showGameOver();
		}
		if (bugs[i].y > 2732) {
			bugs[i].destroy();
			bugs.splice(i, 1);
		}
	}
	for (var i = fastBugs.length - 1; i >= 0; i--) {
		fastBugs[i].update();
		// Only check collision if it's not an AnimatedBug
		if (fastBugs[i].intersects(jeep) && !(fastBugs[i] instanceof AnimatedBug)) {
			deathReason = "Hit by a fast bug!";
			deathReasonTxt.setText(deathReason);
			LK.showGameOver();
		}
		if (fastBugs[i].y > 2732) {
			fastBugs[i].destroy();
			fastBugs.splice(i, 1);
		}
	}
	for (var i = trees.length - 1; i >= 0; i--) {
		trees[i].update();
		if (trees[i].trunkIntersects(jeep)) {
			deathReason = "Crashed into a tree!";
			deathReasonTxt.setText(deathReason);
			LK.showGameOver();
		}
		if (trees[i].y > 2732) {
			trees[i].destroy();
			trees.splice(i, 1);
		}
	}
};
// Initialize the game
initGame();
// Import the tween plugin

===================================================================
--- original.js
+++ change.js
@@ -117,12 +117,12 @@
 	});
 	self.speed = 10;
 	self.update = function () {
 		var dx = targetPosition.x - self.x;
-		var dy = targetPosition.y - self.y;
-		var angle = Math.atan2(dy, dx);
-		self.x += self.speed * Math.cos(angle);
-		self.y += self.speed * Math.sin(angle);
+		// Only update x position, ignore vertical movement
+		self.x += self.speed * (dx > 0 ? 1 : dx < 0 ? -1 : 0);
+		// Keep y position fixed
+		self.y = 2732 - 200; // Fixed position at bottom of screen
 	};
 });
 var Tree = Container.expand(function () {
 	var self = Container.call(this);
@@ -269,11 +269,12 @@
 		if (x >= fastBugs[i].x - 100 && x <= fastBugs[i].x + 100 && y >= fastBugs[i].y - 100 && y <= fastBugs[i].y + 100) {
 			return;
 		}
 	}
-	// Set target position for the jeep movement
+	// Set target position for the jeep movement (horizontal only)
 	targetPosition.x = x;
-	targetPosition.y = y;
+	// Keep targetPosition.y fixed to maintain jeep's vertical position
+	targetPosition.y = 2732 - 200;
 };
 game.update = function () {
 	// Update grass stripes
 	for (var i = 0; i < grassStripes.length; i++) {