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

/**** 
* Classes
****/ 
var AnswerButton = Container.expand(function (optionText, index) {
	var self = Container.call(this);
	var buttonGraphics = self.attachAsset('button', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	var optionLetter = ['A', 'B', 'C', 'D'][index];
	var buttonText = new Text2(optionLetter + ': ' + optionText, {
		size: 60,
		fill: 0xFFFFFF
	});
	buttonText.anchor.set(0.5, 0.5);
	self.addChild(buttonText);
	self.isCorrect = false;
	self.optionText = optionText;
	self.setCorrect = function (correct) {
		self.isCorrect = correct;
	};
	self.showResult = function (isSelected) {
		if (isSelected) {
			if (self.isCorrect) {
				tween(buttonGraphics, {
					tint: 0x42f56f
				}, {
					duration: 300
				});
				LK.getSound('correct').play();
			} else {
				tween(buttonGraphics, {
					tint: 0xf54242
				}, {
					duration: 300
				});
				LK.getSound('wrong').play();
			}
		} else if (self.isCorrect) {
			tween(buttonGraphics, {
				tint: 0x42f56f
			}, {
				duration: 300
			});
		}
	};
	self.reset = function () {
		tween(buttonGraphics, {
			tint: 0x4287f5
		}, {
			duration: 300
		});
	};
	self.down = function (x, y, obj) {
		tween(buttonGraphics, {
			scaleX: 0.95,
			scaleY: 0.95
		}, {
			duration: 100
		});
	};
	self.up = function (x, y, obj) {
		tween(buttonGraphics, {
			scaleX: 1,
			scaleY: 1
		}, {
			duration: 100
		});
		// Handle selection in the game class
		if (typeof game.onOptionSelected === 'function') {
			game.onOptionSelected(self);
		}
	};
	return self;
});
var Question = Container.expand(function () {
	var self = Container.call(this);
	self.question = "";
	self.options = [];
	self.correctAnswer = 0;
	self.difficulty = 0;
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0xf0f0f0
});

/**** 
* Game Code
****/ 
// Game configuration
var currentQuestion = 0;
var totalQuestions = 20;
var questions = [];
var answerButtons = [];
var questionText = null;
var difficultyText = null;
var progressText = null;
var canAnswer = true;
var difficultyLevels = ["Easy", "Medium", "Difficult", "Extreme"];
var currentDifficulty = 0;
var wrongAnswerCount = 0;
var wrongCountText = null;
// Generate questions of increasing difficulty
function generateQuestions() {
	questions = [];
	// Easy questions (1-5)
	for (var i = 0; i < 5; i++) {
		var num1 = Math.floor(Math.random() * 10) + 1;
		var num2 = Math.floor(Math.random() * 10) + 1;
		var operation = ['+', '-'][Math.floor(Math.random() * 2)]; // Only addition and subtraction
		var correctAnswer = calculateAnswer(num1, num2, operation);
		questions.push({
			question: "".concat(num1, " ").concat(operation, " ").concat(num2, " = ?"),
			options: generateOptions(correctAnswer, 20),
			correctAnswer: correctAnswer,
			difficulty: 0
		});
	}
	// Medium questions (6-10)
	for (var i = 0; i < 5; i++) {
		var num1 = Math.floor(Math.random() * 20) + 10;
		var num2 = Math.floor(Math.random() * 20) + 10;
		var operation = ['+', '-', '/'][Math.floor(Math.random() * 3)]; // Exclude multiplication
		if (operation === '/' && num1 % num2 !== 0) {
			// Make sure division results in an integer
			num1 = num2 * (Math.floor(Math.random() * 10) + 1);
		}
		var correctAnswer = calculateAnswer(num1, num2, operation);
		questions.push({
			question: "".concat(num1, " ").concat(operation, " ").concat(num2, " = ?"),
			options: generateOptions(correctAnswer, 50),
			correctAnswer: correctAnswer,
			difficulty: 1
		});
	}
	// Difficult questions (11-15)
	for (var i = 0; i < 5; i++) {
		var num1 = Math.floor(Math.random() * 50) + 20;
		var num2 = Math.floor(Math.random() * 30) + 10;
		var num3 = Math.floor(Math.random() * 10) + 1;
		var operations = ['+', '-', '*'];
		var op1 = operations[Math.floor(Math.random() * 3)];
		var op2 = operations[Math.floor(Math.random() * 3)];
		var question = "".concat(num1, " ").concat(op1, " ").concat(num2, " ").concat(op2, " ").concat(num3, " = ?");
		var correctAnswer = calculateComplexAnswer(num1, num2, num3, op1, op2);
		questions.push({
			question: question,
			options: generateOptions(correctAnswer, 100),
			correctAnswer: correctAnswer,
			difficulty: 2
		});
	}
	// Extreme questions (16-20)
	for (var i = 0; i < 5; i++) {
		var question = "";
		var correctAnswer = 0;
		// Choose a random type of extreme question
		var questionType = Math.floor(Math.random() * 4);
		switch (questionType) {
			case 0:
				// Powers and roots
				var base = Math.floor(Math.random() * 10) + 2;
				var exponent = Math.floor(Math.random() * 3) + 2;
				question = "".concat(base, "^").concat(exponent, " = ?");
				correctAnswer = Math.pow(base, exponent);
				break;
			case 1:
				// Percentage problems
				var whole = Math.floor(Math.random() * 100) + 50;
				var percentage = Math.floor(Math.random() * 90) + 10;
				question = "".concat(percentage, "% of ").concat(whole, " = ?");
				correctAnswer = percentage / 100 * whole;
				break;
			case 2:
				// Complex equation
				var a = Math.floor(Math.random() * 10) + 1;
				var b = Math.floor(Math.random() * 20) + 10;
				var c = Math.floor(Math.random() * 5) + 1;
				var d = Math.floor(Math.random() * 10) + 5;
				question = "(".concat(a, " \xD7 ").concat(b, ") \xF7 (").concat(c, " + ").concat(d, ") = ?");
				correctAnswer = a * b / (c + d);
				correctAnswer = Math.round(correctAnswer * 100) / 100; // Round to 2 decimal places
				break;
			case 3:
				// Sequence problems
				var start = Math.floor(Math.random() * 5) + 1;
				var diff = Math.floor(Math.random() * 5) + 2;
				var sequence = [];
				for (var j = 0; j < 5; j++) {
					sequence.push(start + j * diff);
				}
				question = "What comes next: ".concat(sequence.join(", "), ", ?");
				correctAnswer = start + 5 * diff;
				break;
		}
		questions.push({
			question: question,
			options: generateOptions(correctAnswer, 200),
			correctAnswer: correctAnswer,
			difficulty: 3
		});
	}
}
function calculateAnswer(num1, num2, operation) {
	switch (operation) {
		case '+':
			return num1 + num2;
		case '-':
			return num1 - num2;
		case '*':
			return num1 * num2;
		case '/':
			return num1 / num2;
		default:
			return 0;
	}
}
function calculateComplexAnswer(num1, num2, num3, op1, op2) {
	// Follow order of operations (BODMAS)
	if ((op1 === '*' || op1 === '/') && (op2 === '+' || op2 === '-')) {
		// First operation takes precedence
		var intermediateResult = calculateAnswer(num1, num2, op1);
		return calculateAnswer(intermediateResult, num3, op2);
	} else {
		// Second operation takes precedence
		var intermediateResult = calculateAnswer(num2, num3, op2);
		return calculateAnswer(num1, intermediateResult, op1);
	}
}
function generateOptions(correctAnswer, range) {
	var options = [correctAnswer];
	// Generate 3 wrong answers
	while (options.length < 4) {
		var offset = Math.floor(Math.random() * range) - range / 2;
		var wrongAnswer = correctAnswer + offset;
		// Make sure the wrong answer is not the same as any existing options
		// and is not negative
		if (offset !== 0 && !options.includes(wrongAnswer) && wrongAnswer >= 0) {
			options.push(wrongAnswer);
		}
	}
	// Shuffle options
	for (var i = options.length - 1; i > 0; i--) {
		var j = Math.floor(Math.random() * (i + 1));
		var temp = options[i];
		options[i] = options[j];
		options[j] = temp;
	}
	// Round decimal answers for better display
	for (var i = 0; i < options.length; i++) {
		if (options[i] % 1 !== 0) {
			options[i] = Math.round(options[i] * 100) / 100;
		}
	}
	return options;
}
function initializeGame() {
	// Clear any existing elements
	while (game.children.length > 0) {
		game.removeChild(game.children[0]);
	}
	// Reset variables
	currentQuestion = 0;
	currentDifficulty = 0;
	answerButtons = [];
	wrongAnswerCount = 0;
	canAnswer = true;
	// Generate new questions
	generateQuestions();
	// Create title
	var titleText = new Text2("Math Challenge Quiz", {
		size: 100,
		fill: 0x1A1A1A
	});
	titleText.anchor.set(0.5, 0);
	titleText.x = 2048 / 2;
	titleText.y = 100;
	game.addChild(titleText);
	// Create difficulty indicator
	difficultyText = new Text2("Difficulty: ".concat(difficultyLevels[currentDifficulty]), {
		size: 60,
		fill: 0x1A1A1A
	});
	difficultyText.anchor.set(0.5, 0);
	difficultyText.x = 2048 / 2;
	difficultyText.y = 220;
	game.addChild(difficultyText);
	// Create progress indicator
	progressText = new Text2("Question: ".concat(currentQuestion + 1, "/").concat(totalQuestions), {
		size: 60,
		fill: 0x1A1A1A
	});
	progressText.anchor.set(0.5, 0);
	progressText.x = 2048 / 2;
	progressText.y = 300;
	game.addChild(progressText);
	// Create question text
	questionText = new Text2("", {
		size: 80,
		fill: 0x1A1A1A
	});
	questionText.anchor.set(0.5, 0);
	questionText.x = 2048 / 2;
	questionText.y = 450;
	game.addChild(questionText);
	// Create answer buttons
	for (var i = 0; i < 4; i++) {
		var button = new AnswerButton("", i);
		// Calculate position
		var buttonWidth = 600;
		var buttonHeight = 250;
		var padding = 100;
		if (i < 2) {
			button.x = 2048 / 2 - buttonWidth / 2 - padding / 2 + i * (buttonWidth + padding);
			button.y = 800;
		} else {
			button.x = 2048 / 2 - buttonWidth / 2 - padding / 2 + (i - 2) * (buttonWidth + padding);
			button.y = 1100;
		}
		game.addChild(button);
		answerButtons.push(button);
	}
	// Create score display
	var scoreText = new Text2("Score: 0", {
		size: 60,
		fill: 0x1A1A1A
	});
	scoreText.anchor.set(1, 0);
	scoreText.x = 2048 - 50;
	scoreText.y = 50;
	game.addChild(scoreText);
	// Create wrong answer counter
	wrongCountText = new Text2("Mistakes: 0/4", {
		size: 60,
		fill: 0xf54242
	});
	wrongCountText.anchor.set(0, 0);
	wrongCountText.x = 50;
	wrongCountText.y = 50;
	game.addChild(wrongCountText);
	// Display first question
	displayQuestion(currentQuestion);
	// Play background music
	LK.playMusic('bgMusic');
}
function displayQuestion(questionIndex) {
	if (questionIndex >= questions.length) {
		return;
	}
	var question = questions[questionIndex];
	// Update difficulty if needed
	var newDifficulty = question.difficulty;
	if (newDifficulty !== currentDifficulty) {
		currentDifficulty = newDifficulty;
		difficultyText.setText("Difficulty: ".concat(difficultyLevels[currentDifficulty]));
		LK.getSound('levelUp').play();
	}
	// Update progress
	progressText.setText("Question: ".concat(questionIndex + 1, "/").concat(totalQuestions));
	// Update question text
	questionText.setText(question.question);
	// Reset and update all buttons
	for (var i = 0; i < 4; i++) {
		answerButtons[i].reset();
		answerButtons[i].setCorrect(question.options[i] === question.correctAnswer);
		var buttonText = new Text2(['A', 'B', 'C', 'D'][i] + ': ' + question.options[i], {
			size: 60,
			fill: 0xFFFFFF
		});
		buttonText.anchor.set(0.5, 0.5);
		// Remove any existing text
		while (answerButtons[i].children.length > 1) {
			answerButtons[i].removeChild(answerButtons[i].children[1]);
		}
		answerButtons[i].addChild(buttonText);
		answerButtons[i].optionText = question.options[i];
	}
	canAnswer = true;
}
game.onOptionSelected = function (selectedButton) {
	if (!canAnswer) return;
	canAnswer = false;
	// Show results for all buttons
	for (var i = 0; i < answerButtons.length; i++) {
		answerButtons[i].showResult(answerButtons[i] === selectedButton);
	}
	// Check if the selected answer is correct
	if (selectedButton.isCorrect) {
		// Increase score
		LK.setScore(LK.getScore() + 1);
		// Move to next question after a delay
		LK.setTimeout(function () {
			currentQuestion++;
			if (currentQuestion >= totalQuestions) {
				// Game completed
				LK.showYouWin();
			} else {
				displayQuestion(currentQuestion);
			}
		}, 1000);
	} else {
		// Increase wrong answer count
		wrongAnswerCount++;
		wrongCountText.setText("Mistakes: " + wrongAnswerCount + "/4");
		// If 4 wrong answers, show game over after a delay
		if (wrongAnswerCount >= 4) {
			LK.setTimeout(function () {
				LK.showGameOver();
			}, 1500);
		} else {
			// Otherwise, continue to next question after a delay
			LK.setTimeout(function () {
				currentQuestion++;
				if (currentQuestion >= totalQuestions) {
					// Game completed
					LK.showYouWin();
				} else {
					displayQuestion(currentQuestion);
				}
			}, 1500);
		}
	}
};
// On window resize, make sure everything is positioned correctly
LK.on('resize', function () {
	// The engine handles scaling automatically
});
// Initialize the game
initializeGame();

===================================================================
--- original.js
+++ change.js
@@ -117,9 +117,9 @@
 	// Easy questions (1-5)
 	for (var i = 0; i < 5; i++) {
 		var num1 = Math.floor(Math.random() * 10) + 1;
 		var num2 = Math.floor(Math.random() * 10) + 1;
-		var operation = ['+', '-', '*'][Math.floor(Math.random() * 3)];
+		var operation = ['+', '-'][Math.floor(Math.random() * 2)]; // Only addition and subtraction
 		var correctAnswer = calculateAnswer(num1, num2, operation);
 		questions.push({
 			question: "".concat(num1, " ").concat(operation, " ").concat(num2, " = ?"),
 			options: generateOptions(correctAnswer, 20),
@@ -130,9 +130,9 @@
 	// Medium questions (6-10)
 	for (var i = 0; i < 5; i++) {
 		var num1 = Math.floor(Math.random() * 20) + 10;
 		var num2 = Math.floor(Math.random() * 20) + 10;
-		var operation = ['+', '-', '*', '/'][Math.floor(Math.random() * 4)];
+		var operation = ['+', '-', '/'][Math.floor(Math.random() * 3)]; // Exclude multiplication
 		if (operation === '/' && num1 % num2 !== 0) {
 			// Make sure division results in an integer
 			num1 = num2 * (Math.floor(Math.random() * 10) + 1);
 		}