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

/**** 
* Classes
****/ 
// Define a class for enemies
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.attachAsset('enemy', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 8;
	self.update = function () {
		self.x -= self.speed;
		if (self.x < -50) {
			self.destroy();
		}
	};
});
//<Assets used in the game will automatically appear here>
// Define a class for the player character
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.jumpHeight = 40; // Further increased jump power
	self.isJumping = false;
	self.velocityY = 0;
	self.update = function () {
		if (self.isJumping) {
			self.y += self.velocityY;
			self.velocityY += 0.7; // Decreased gravity effect by 30%
			if (self.y >= 2732 / 2) {
				// Ground level
				self.y = 2732 / 2;
				self.isJumping = false;
				self.velocityY = 0;
			}
		}
	};
	self.jump = function () {
		if (!self.isJumping) {
			self.isJumping = true;
			self.velocityY = -self.jumpHeight;
		}
	};
});
// Define a class for Uranus planet
var Uranus = Container.expand(function () {
	var self = Container.call(this);
	var uranusGraphics = self.attachAsset('uranus', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5;
	self.startY = 250; // Store initial Y position
	self.zigzagAmount = 100; // Amount of vertical movement
	self.zigzagSpeed = 0.02; // Speed of vertical oscillation
	self.zigzagOffset = Math.random() * Math.PI * 2; // Random starting position in the cycle
	self.update = function () {
		self.x += self.speed;
		// Add zigzag movement using sine wave for smooth oscillation
		self.y = self.startY + Math.sin(LK.ticks * self.zigzagSpeed + self.zigzagOffset) * self.zigzagAmount;
		if (self.x > 2048 + 125) {
			self.x = -125;
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87CEEB // Sky blue background
});

/**** 
* Game Code
****/ 
// Import tween library for animations
var background = game.addChild(LK.getAsset('background', {
	anchorX: 0,
	anchorY: 0
}));
background.x = 0;
background.y = 0;
// Initialize Uranus
var uranus = game.addChild(new Uranus());
uranus.x = -125;
uranus.y = 250; // Position at the top of the screen
uranus.startY = 250; // Store initial Y position for zigzag movement
// Initialize player
var player = game.addChild(new Player());
player.x = 2048 / 2;
player.y = 2732 / 2;
// Initialize enemies
var enemies = [];
var enemySpawnInterval = 100;
var enemySpawnCounter = 0;
// Create a new Text2 object to display the score
var scoreText = new Text2('0', {
	size: 100,
	fill: 0xFFFFFF
});
// Add the score text to the game GUI at the top center of the screen
LK.gui.top.addChild(scoreText);
scoreText.x = 2048 / 2;
scoreText.y = 0;
// Handle game updates
game.update = function () {
	player.update();
	// Update Uranus
	uranus.update();
	// Spawn enemies
	enemySpawnCounter++;
	if (enemySpawnCounter >= enemySpawnInterval) {
		var enemy = new Enemy();
		enemy.x = 2048;
		enemy.y = 2732 / 2;
		enemies.push(enemy);
		game.addChild(enemy);
		// Randomize the spawn interval for the next enemy
		enemySpawnInterval = Math.floor(Math.random() * 150) + 50;
		enemySpawnCounter = 0;
	}
	// Update enemies
	for (var j = enemies.length - 1; j >= 0; j--) {
		enemies[j].update();
		if (player.intersects(enemies[j])) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		} else if (player.x > enemies[j].x && !enemies[j].passed) {
			enemies[j].passed = true;
			LK.setScore(LK.getScore() + 1);
			scoreText.setText(LK.getScore());
		}
	}
};
// Handle player jump
game.down = function (x, y, obj) {
	player.jump();
};

===================================================================
--- original.js
+++ change.js
@@ -1,5 +1,10 @@
 /**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
 * Classes
 ****/ 
 // Define a class for enemies
 var Enemy = Container.expand(function () {
@@ -54,10 +59,16 @@
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
 	self.speed = 5;
+	self.startY = 250; // Store initial Y position
+	self.zigzagAmount = 100; // Amount of vertical movement
+	self.zigzagSpeed = 0.02; // Speed of vertical oscillation
+	self.zigzagOffset = Math.random() * Math.PI * 2; // Random starting position in the cycle
 	self.update = function () {
 		self.x += self.speed;
+		// Add zigzag movement using sine wave for smooth oscillation
+		self.y = self.startY + Math.sin(LK.ticks * self.zigzagSpeed + self.zigzagOffset) * self.zigzagAmount;
 		if (self.x > 2048 + 125) {
 			self.x = -125;
 		}
 	};
@@ -73,8 +84,9 @@
 
 /**** 
 * Game Code
 ****/ 
+// Import tween library for animations
 var background = game.addChild(LK.getAsset('background', {
 	anchorX: 0,
 	anchorY: 0
 }));
@@ -83,8 +95,9 @@
 // Initialize Uranus
 var uranus = game.addChild(new Uranus());
 uranus.x = -125;
 uranus.y = 250; // Position at the top of the screen
+uranus.startY = 250; // Store initial Y position for zigzag movement
 // Initialize player
 var player = game.addChild(new Player());
 player.x = 2048 / 2;
 player.y = 2732 / 2;