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

/**** 
* Classes
****/ 
// Define the Button class
var Button = Container.expand(function () {
	var self = Container.call(this);
	var buttonGraphics = self.attachAsset('button', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	return self;
});
// Define the Key3 class
var Key3 = Container.expand(function () {
	var self = Container.call(this);
	var keyGraphics = self.attachAsset('key3', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5; // Initial speed
	// Update method for key movement
	self.update = function () {
		self.x -= self.speed;
	};
	return self;
});
// Define the Obstacle class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	var obstacleGraphics = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = 5; // Initial speed
	// Update method for obstacle movement
	self.update = function () {
		self.x -= self.speed;
	};
	return self;
});
//<Assets used in the game will automatically appear here>
//<Write imports for supported plugins here>
// Define the Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('character', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.layer = 1; // Start on the middle layer
	self.speed = 10; // Initial speed
	// Method to move the player up a layer
	self.moveUp = function () {
		if (self.layer > 0) {
			self.layer--;
			tween(self, {
				y: self.y - 450
			}, {
				duration: 300,
				easing: tween.easeInOut
			});
		}
	};
	// Method to move the player down a layer
	self.moveDown = function () {
		if (self.layer < 2) {
			self.layer++;
			tween(self, {
				y: self.y + 450
			}, {
				duration: 300,
				easing: tween.easeInOut
			});
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x0000FF //Init game with blue background
});

/**** 
* Game Code
****/ 
var background = game.attachAsset('background', {
	anchorX: 0.0,
	anchorY: 0.0
});
background.x = 0;
background.y = 0;
// Initialize player
var player = new Player();
player.x = 200;
player.y = 1366 - 450; // Start on the middle layer
game.addChild(player);
// Create a variable to keep track of the current character asset
var characterAssets = ['character', 'c2', 'c3', 'c4'];
var currentCharacterAsset = 0;
// Create a timer to change the character asset every 0.2 seconds
LK.setInterval(function () {
	// Remove the current character asset
	player.removeChild(player.children[0]);
	// Update the current character asset index
	currentCharacterAsset = (currentCharacterAsset + 1) % characterAssets.length;
	// Attach the new character asset
	player.attachAsset(characterAssets[currentCharacterAsset], {
		anchorX: 0.5,
		anchorY: 0.5
	});
}, 200);
// Initialize buttons
var buttonUp = new Button();
buttonUp.x = 1024;
buttonUp.y = 2732 - 600; // Position at the bottom of the screen
buttonUp.scale.set(2); // Increase the size of the button
game.addChild(buttonUp);
var buttonDown = new Button();
buttonDown.x = 1024;
buttonDown.y = 2732 - 300; // Position at the bottom of the screen
buttonDown.scale.set(2); // Increase the size of the button
buttonDown.rotation = Math.PI; // Rotate the button by 180 degrees
game.addChild(buttonDown);
// Initialize obstacles array
var obstacles = [];
// Initialize score
var score = 0;
var scoreTxt = new Text2('0', {
	size: 150,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Function to create obstacles
function createObstacle() {
	var obstacle = new Obstacle();
	obstacle.x = 2048;
	obstacle.y = 1366 - 450 + (Math.floor(Math.random() * 3) - 1) * 450; // Random layer
	obstacles.push(obstacle);
	game.addChild(obstacle);
}
// Function to update game speed
function updateSpeed() {
	player.speed += 0.02;
	obstacles.forEach(function (obstacle) {
		obstacle.speed += 0.02;
	});
}
// Handle swipe up and down
game.move = function (x, y, obj) {
	if (obj.event && obj.event.deltaY < 0) {
		player.moveUp();
	} else if (obj.event && obj.event.deltaY > 0) {
		player.moveDown();
	}
};
// Handle button presses
buttonUp.down = function (x, y, obj) {
	if (!buttonUp.cooldown && !buttonDown.cooldown) {
		player.moveUp();
		buttonUp.cooldown = true;
		buttonDown.cooldown = true;
		LK.setTimeout(function () {
			buttonUp.cooldown = false;
			buttonDown.cooldown = false;
		}, 310);
	}
};
buttonDown.down = function (x, y, obj) {
	if (!buttonUp.cooldown && !buttonDown.cooldown) {
		player.moveDown();
		buttonUp.cooldown = true;
		buttonDown.cooldown = true;
		LK.setTimeout(function () {
			buttonUp.cooldown = false;
			buttonDown.cooldown = false;
		}, 310);
	}
};
// Game update loop
game.update = function () {
	// Update obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		obstacles[i].update();
		if (obstacles[i].x < -100) {
			obstacles[i].destroy();
			obstacles.splice(i, 1);
			score++;
			scoreTxt.setText(score);
		}
		if (score > 0 && score % 20 === 0 && !keySpawned) {
			var key = new Key3();
			key.x = 2048;
			key.y = 1366 - 450 + (Math.floor(Math.random() * 3) - 1) * 450; // Random layer
			game.addChild(key);
			keySpawned = true;
		}
		if (score % 20 !== 0) {
			keySpawned = false;
		}
		if (obstacles[i].intersects(player)) {
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
		}
	}
	// Create new obstacles
	if (LK.ticks % 60 == 0) {
		createObstacle();
	}
	// Update speed
	updateSpeed();
};

===================================================================
--- original.js
+++ change.js
@@ -14,8 +14,22 @@
 		anchorY: 0.5
 	});
 	return self;
 });
+// Define the Key3 class
+var Key3 = Container.expand(function () {
+	var self = Container.call(this);
+	var keyGraphics = self.attachAsset('key3', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5; // Initial speed
+	// Update method for key movement
+	self.update = function () {
+		self.x -= self.speed;
+	};
+	return self;
+});
 // Define the Obstacle class
 var Obstacle = Container.expand(function () {
 	var self = Container.call(this);
 	var obstacleGraphics = self.attachAsset('bullet', {
@@ -179,19 +193,20 @@
 		if (obstacles[i].x < -100) {
 			obstacles[i].destroy();
 			obstacles.splice(i, 1);
 			score++;
-			if (score % 10 === 0) {
-				var key3 = LK.getAsset('key3', {
-					anchorX: 0.5,
-					anchorY: 0.5
-				});
-				key3.x = Math.random() * 2048;
-				key3.y = Math.random() * 2732;
-				game.addChild(key3);
-			}
 			scoreTxt.setText(score);
 		}
+		if (score > 0 && score % 20 === 0 && !keySpawned) {
+			var key = new Key3();
+			key.x = 2048;
+			key.y = 1366 - 450 + (Math.floor(Math.random() * 3) - 1) * 450; // Random layer
+			game.addChild(key);
+			keySpawned = true;
+		}
+		if (score % 20 !== 0) {
+			keySpawned = false;
+		}
 		if (obstacles[i].intersects(player)) {
 			LK.effects.flashScreen(0xff0000, 1000);
 			LK.showGameOver();
 		}