===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,275 @@
-/****
+/**** 
+* Classes
+****/ 
+var CalculatorButton = Container.expand(function (label, type, callback) {
+	var self = Container.call(this);
+	var buttonType = type || 'number';
+	var buttonShape;
+	if (buttonType === 'operator') {
+		buttonShape = self.attachAsset('operatorButton', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+	} else if (buttonType === 'equals') {
+		buttonShape = self.attachAsset('equalsButton', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+	} else if (buttonType === 'clear') {
+		buttonShape = self.attachAsset('clearButton', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+	} else {
+		buttonShape = self.attachAsset('calculatorButton', {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+	}
+	var buttonText = new Text2(label, {
+		size: 60,
+		fill: buttonType === 'number' ? "#000000" : "#ffffff"
+	});
+	buttonText.anchor.set(0.5, 0.5);
+	self.addChild(buttonText);
+	self.callback = callback;
+	self.down = function (x, y, obj) {
+		buttonShape.alpha = 0.7;
+		if (self.callback) {
+			self.callback();
+		}
+	};
+	self.up = function (x, y, obj) {
+		buttonShape.alpha = 1.0;
+	};
+	return self;
+});
+var CurrencyDisplay = Container.expand(function (currencyCode, rate) {
+	var self = Container.call(this);
+	self.currencyCode = currencyCode;
+	self.rate = rate;
+	self.currencyLabel = new Text2(currencyCode + ':', {
+		size: 40,
+		fill: 0xFFFFFF
+	});
+	self.currencyLabel.anchor.set(0, 0.5);
+	self.addChild(self.currencyLabel);
+	self.valueText = new Text2('0.00', {
+		size: 40,
+		fill: 0xFFFFFF
+	});
+	self.valueText.anchor.set(1, 0.5);
+	self.valueText.x = 300;
+	self.addChild(self.valueText);
+	self.updateValue = function (usdAmount) {
+		var convertedAmount = usdAmount * self.rate;
+		if (self.currencyCode === 'JPY') {
+			self.valueText.setText(Math.round(convertedAmount).toString());
+		} else {
+			self.valueText.setText(convertedAmount.toFixed(2));
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x2c3e50
+});
+
+/**** 
+* Game Code
+****/ 
+// Calculator state
+var currentDisplay = '0';
+var previousValue = 0;
+var currentOperation = null;
+var waitingForNewInput = false;
+// Currency exchange rates (mock data - in real app would fetch from API)
+var exchangeRates = {
+	'EUR': 0.85,
+	'GBP': 0.73,
+	'JPY': 110.25,
+	'CAD': 1.25,
+	'AUD': 1.35,
+	'CHF': 0.92
+};
+// Display background
+var displayBg = game.addChild(LK.getAsset('displayBackground', {
+	anchorX: 0.5,
+	anchorY: 0
+}));
+displayBg.x = 1024;
+displayBg.y = 200;
+// Main display text
+var displayText = new Text2(currentDisplay, {
+	size: 80,
+	fill: 0xFFFFFF
+});
+displayText.anchor.set(1, 0.5);
+displayText.x = 1900;
+displayText.y = 300;
+game.addChild(displayText);
+// USD label
+var usdLabel = new Text2('USD', {
+	size: 50,
+	fill: 0xFFFFFF
+});
+usdLabel.anchor.set(0, 0.5);
+usdLabel.x = 200;
+usdLabel.y = 300;
+game.addChild(usdLabel);
+// Currency conversion background
+var currencyBg = game.addChild(LK.getAsset('currencyBackground', {
+	anchorX: 0.5,
+	anchorY: 1
+}));
+currencyBg.x = 1024;
+currencyBg.y = 2732;
+// Currency displays
+var currencyDisplays = [];
+var currencies = Object.keys(exchangeRates);
+for (var i = 0; i < currencies.length; i++) {
+	var currency = currencies[i];
+	var display = new CurrencyDisplay(currency, exchangeRates[currency]);
+	display.x = 200 + i % 3 * 600;
+	display.y = 2732 - 350 + Math.floor(i / 3) * 80;
+	currencyDisplays.push(display);
+	game.addChild(display);
+}
+// Calculator functions
+function updateDisplay() {
+	displayText.setText(currentDisplay);
+	var numericValue = parseFloat(currentDisplay) || 0;
+	for (var i = 0; i < currencyDisplays.length; i++) {
+		currencyDisplays[i].updateValue(numericValue);
+	}
+}
+function inputNumber(num) {
+	if (waitingForNewInput) {
+		currentDisplay = num;
+		waitingForNewInput = false;
+	} else {
+		if (currentDisplay === '0') {
+			currentDisplay = num;
+		} else {
+			currentDisplay += num;
+		}
+	}
+	updateDisplay();
+}
+function inputDecimal() {
+	if (waitingForNewInput) {
+		currentDisplay = '0.';
+		waitingForNewInput = false;
+	} else if (currentDisplay.indexOf('.') === -1) {
+		currentDisplay += '.';
+	}
+	updateDisplay();
+}
+function inputOperation(op) {
+	if (currentOperation !== null && !waitingForNewInput) {
+		calculate();
+	}
+	previousValue = parseFloat(currentDisplay);
+	currentOperation = op;
+	waitingForNewInput = true;
+}
+function calculate() {
+	var current = parseFloat(currentDisplay);
+	var result = previousValue;
+	switch (currentOperation) {
+		case '+':
+			result = previousValue + current;
+			break;
+		case '-':
+			result = previousValue - current;
+			break;
+		case '×':
+			result = previousValue * current;
+			break;
+		case '÷':
+			if (current !== 0) {
+				result = previousValue / current;
+			}
+			break;
+	}
+	currentDisplay = result.toString();
+	if (currentDisplay.length > 12) {
+		currentDisplay = result.toExponential(6);
+	}
+	currentOperation = null;
+	waitingForNewInput = true;
+	updateDisplay();
+}
+function clearAll() {
+	currentDisplay = '0';
+	previousValue = 0;
+	currentOperation = null;
+	waitingForNewInput = false;
+	updateDisplay();
+}
+// Create calculator buttons
+var buttons = [];
+// Number buttons (0-9)
+var numberLayout = [['7', '8', '9'], ['4', '5', '6'], ['1', '2', '3'], ['0', '.', '=']];
+for (var row = 0; row < numberLayout.length; row++) {
+	for (var col = 0; col < numberLayout[row].length; col++) {
+		var buttonLabel = numberLayout[row][col];
+		var buttonType = 'number';
+		var callback;
+		if (buttonLabel === '=') {
+			buttonType = 'equals';
+			callback = calculate;
+		} else if (buttonLabel === '.') {
+			callback = inputDecimal;
+		} else {
+			callback = function (num) {
+				return function () {
+					inputNumber(num);
+				};
+			}(buttonLabel);
+		}
+		var button = new CalculatorButton(buttonLabel, buttonType, callback);
+		button.x = 300 + col * 200;
+		button.y = 500 + row * 140;
+		buttons.push(button);
+		game.addChild(button);
+	}
+}
+// Operation buttons
+var operations = [{
+	label: '÷',
+	op: '÷'
+}, {
+	label: '×',
+	op: '×'
+}, {
+	label: '-',
+	op: '-'
+}, {
+	label: '+',
+	op: '+'
+}];
+for (var i = 0; i < operations.length; i++) {
+	var op = operations[i];
+	var opButton = new CalculatorButton(op.label, 'operator', function (operation) {
+		return function () {
+			inputOperation(operation);
+		};
+	}(op.op));
+	opButton.x = 900;
+	opButton.y = 500 + i * 140;
+	buttons.push(opButton);
+	game.addChild(opButton);
+}
+// Clear button
+var clearBtn = new CalculatorButton('C', 'clear', clearAll);
+clearBtn.x = 1200;
+clearBtn.y = 500;
+buttons.push(clearBtn);
+game.addChild(clearBtn);
+// Initialize display
+updateDisplay();
\ No newline at end of file