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

/**** 
* Classes
****/ 
// Bird class
var Bird = Container.expand(function () {
	var self = Container.call(this);
	// Attach bird asset (ellipse, yellow)
	var birdAsset = self.attachAsset('bird', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// Set up bird asset properties
	birdAsset.width = 120;
	birdAsset.height = 120;
	birdAsset.color = 0xffe066;
	birdAsset.shape = 'ellipse';
	// Bird physics
	self.velocityY = 0;
	self.gravity = 1.1; // Gravity per frame (slightly faster than before)
	self.flapStrength = -26; // Negative for upward movement (higher jump)
	// Bird update method (called every tick)
	self.update = function () {
		self.velocityY += self.gravity;
		self.y += self.velocityY;
		// Clamp bird to not go above the screen
		if (self.y < self.height / 2) {
			self.y = self.height / 2;
			self.velocityY = 0;
		}
	};
	// Flap method
	self.flap = function () {
		self.velocityY = self.flapStrength;
	};
	return self;
});
// Coin class
var Coin = Container.expand(function () {
	var self = Container.call(this);
	// Attach coin asset (ellipse, gold)
	var coinAsset = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 100,
		height: 100,
		color: 0xffd700,
		shape: 'ellipse',
		x: 0,
		y: 0
	});
	self.collected = false;
	// Coin update: move left at pipe speed
	self.update = function (speed) {
		self.x -= speed;
	};
	return self;
});
// PipePair class (top and bottom pipes as a pair)
var PipePair = Container.expand(function () {
	var self = Container.call(this);
	// Pipe properties
	self.pipeWidth = 220;
	self.gapHeight = 520; // Vertical gap between pipes
	self.speed = 16; // Speed at which pipes move left (increased for faster gameplay)
	// Randomize gap position
	var minGapY = 400;
	var maxGapY = 2732 - 400 - self.gapHeight;
	self.gapY = minGapY + Math.floor(Math.random() * (maxGapY - minGapY + 1));
	// Top pipe
	self.topPipe = self.attachAsset('pipeTop', {
		anchorX: 0.5,
		anchorY: 1.0,
		width: self.pipeWidth,
		height: self.gapY,
		color: 0x4ec04e,
		shape: 'box',
		x: 0,
		y: self.gapY
	});
	// Bottom pipe
	self.bottomPipe = self.attachAsset('pipeBottom', {
		anchorX: 0.5,
		anchorY: 0.0,
		width: self.pipeWidth,
		height: 2732 - (self.gapY + self.gapHeight),
		color: 0x4ec04e,
		shape: 'box',
		x: 0,
		y: self.gapY + self.gapHeight
	});
	// Scoring flag (to ensure only one score per pipe pair)
	self.scored = false;
	// Add coin between pipes
	self.coin = new Coin();
	// Place coin in the center of the gap
	self.coin.x = 0;
	self.coin.y = self.gapY + self.gapHeight / 2;
	self.addChild(self.coin);
	// Update method
	self.update = function () {
		self.x -= self.speed;
		// Coin does not move independently; it stays fixed between the pipes
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87ceeb // Sky blue
});

/**** 
* Game Code
****/ 
// Tween plugin for animations (optional, not used in MVP but included for future use)
// Game constants
var GROUND_HEIGHT = 220;
var PIPE_INTERVAL = 70; // Frames between pipes (faster spawn rate)
var BIRD_START_X = 600;
var BIRD_START_Y = 1200;
// Game state variables
var bird;
var pipes = [];
var score = 0;
var scoreTxt;
var ground;
var gameStarted = false;
var gameOver = false;
var ticksSinceLastPipe = 0;
// Add ground (simple green box at bottom)
ground = LK.getAsset('ground', {
	anchorX: 0,
	anchorY: 0,
	width: 2048,
	height: GROUND_HEIGHT,
	color: 0x3b7a2a,
	shape: 'box',
	x: 0,
	y: 2732 - GROUND_HEIGHT
});
game.addChild(ground);
// Add bird
bird = new Bird();
bird.x = BIRD_START_X;
bird.y = BIRD_START_Y;
game.addChild(bird);
// Add score text to GUI
scoreTxt = new Text2('0', {
	size: 180,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Add start button to center of screen
var startBtn = new Text2('START', {
	size: 220,
	fill: 0xffffff,
	font: "Impact, Arial Black, Tahoma"
});
startBtn.anchor.set(0.5, 0.5);
startBtn.x = 2048 / 2;
startBtn.y = 2732 / 2;
game.addChild(startBtn);
// Start button tap handler
startBtn.down = function (x, y, obj) {
	if (!gameStarted && !gameOver) {
		startGame();
		startBtn.visible = false;
	}
};
// Show/hide start button based on game state
function showStartButton() {
	if (typeof startBtn !== "undefined") startBtn.visible = true;
}
function hideStartButton() {
	if (typeof startBtn !== "undefined") startBtn.visible = false;
}
// Add money icon and money counter to the right side of the screen
var moneyIcon = LK.getAsset('coin', {
	anchorX: 1,
	anchorY: 0,
	width: 100,
	height: 100,
	x: 0,
	y: 0
});
var moneyAmount = 0;
var moneyTxt = new Text2('0', {
	size: 120,
	fill: 0xffd700
});
moneyTxt.anchor.set(1, 0);
// Position icon and text at the top right, with some margin from the edge
moneyIcon.x = -40;
moneyIcon.y = 40;
moneyTxt.x = -160;
moneyTxt.y = 60;
LK.gui.topRight.addChild(moneyIcon);
LK.gui.topRight.addChild(moneyTxt);
// High score tracking
var highScore = typeof storage.highScore === "number" ? storage.highScore : 0;
var highScoreTxt = new Text2('Best: ' + highScore, {
	size: 100,
	fill: 0xffffff
});
highScoreTxt.anchor.set(1, 1);
// Position at bottom right with margin
highScoreTxt.x = -40;
highScoreTxt.y = -40;
LK.gui.bottomRight.addChild(highScoreTxt);
// Helper: Reset game state
function resetGame() {
	// Remove all pipes
	for (var i = 0; i < pipes.length; i++) {
		pipes[i].destroy();
	}
	pipes = [];
	score = 0;
	scoreTxt.setText('0');
	moneyAmount = typeof storage.moneyAmount === "number" ? storage.moneyAmount : 0;
	if (typeof moneyTxt !== "undefined") moneyTxt.setText(moneyAmount + '');
	// Update high score from storage in case it changed externally
	if (typeof storage.highScore === "number") {
		highScore = storage.highScore;
		if (typeof highScoreTxt !== "undefined") {
			highScoreTxt.setText('Best: ' + highScore);
		}
	}
	bird.x = BIRD_START_X;
	bird.y = BIRD_START_Y;
	bird.velocityY = 0;
	gameStarted = false;
	gameOver = false;
	ticksSinceLastPipe = 0;
	showStartButton();
}
// Helper: Start game (first flap)
function startGame() {
	if (!gameStarted && !gameOver) {
		gameStarted = true;
		hideStartButton();
	}
}
// Helper: End game
function endGame() {
	gameOver = true;
	// Update high score if needed
	if (score > highScore) {
		highScore = score;
		storage.highScore = highScore;
		if (typeof highScoreTxt !== "undefined") {
			highScoreTxt.setText('Best: ' + highScore);
		}
	}
	LK.effects.flashScreen(0xff0000, 600);
	hideStartButton();
	LK.showGameOver();
}
// Game tap/flap handler
game.down = function (x, y, obj) {
	if (gameOver) return;
	if (!gameStarted) {
		startGame();
	}
	bird.flap();
};
// Main game update loop
game.update = function () {
	if (gameOver) return;
	// Only update bird and pipes if game started
	if (gameStarted) {
		bird.update();
		// Add new pipes at interval
		ticksSinceLastPipe++;
		if (ticksSinceLastPipe >= PIPE_INTERVAL) {
			ticksSinceLastPipe = 0;
			var pipePair = new PipePair();
			pipePair.x = 2048 + pipePair.pipeWidth / 2;
			pipePair.y = 0;
			pipes.push(pipePair);
			game.addChild(pipePair);
		}
		// Update pipes and check for collisions
		for (var i = pipes.length - 1; i >= 0; i--) {
			var pipe = pipes[i];
			pipe.update();
			// Remove pipes that have gone off screen
			if (pipe.x < -pipe.pipeWidth / 2) {
				pipe.destroy();
				pipes.splice(i, 1);
				continue;
			}
			// Collision detection (bird with pipes)
			// Use .intersects for both top and bottom pipes
			if (bird.intersects(pipe.topPipe) || bird.intersects(pipe.bottomPipe)) {
				endGame();
				return;
			}
			// Coin collection
			if (pipe.coin && !pipe.coin.collected && bird.intersects(pipe.coin)) {
				pipe.coin.collected = true;
				pipe.coin.visible = false;
				score += 5; // Award 5 points for coin
				scoreTxt.setText(score + '');
				moneyAmount += 1;
				moneyTxt.setText(moneyAmount + '');
				// Persist moneyAmount to storage
				storage.moneyAmount = moneyAmount;
			}
			// Scoring: if bird passes the center of the pipe and hasn't scored yet
			if (!pipe.scored && pipe.x + pipe.pipeWidth / 2 < bird.x - bird.width / 2) {
				pipe.scored = true;
				score += 1;
				scoreTxt.setText(score + '');
			}
		}
		// Collision with ground
		if (bird.y + bird.height / 2 >= 2732 - GROUND_HEIGHT) {
			bird.y = 2732 - GROUND_HEIGHT - bird.height / 2;
			endGame();
			return;
		}
	}
};
// Reset game on game over (handled by LK automatically, but for clarity)
game.onGameOver = function () {
	resetGame();
};
// Initial reset
resetGame();
// Add shop button to bottom center of the screen
var shopBtn = new Text2('SHOP', {
	size: 180,
	fill: 0xffffff,
	font: "Impact, Arial Black, Tahoma"
});
shopBtn.anchor.set(0.5, 0.5);
shopBtn.x = 2048 / 2;
shopBtn.y = 2732 - 180; // 180px above bottom edge for visibility
game.addChild(shopBtn);
// Shop button tap handler (currently just a placeholder)
shopBtn.down = function (x, y, obj) {
	// TODO: Open shop UI or handle shop logic here
	// For now, just flash the screen to show it's working
	LK.effects.flashScreen(0xffff00, 300);
};

===================================================================
--- original.js
+++ change.js
@@ -119,10 +119,10 @@
 
 /**** 
 * Game Code
 ****/ 
-// Game constants
 // Tween plugin for animations (optional, not used in MVP but included for future use)
+// Game constants
 var GROUND_HEIGHT = 220;
 var PIPE_INTERVAL = 70; // Frames between pipes (faster spawn rate)
 var BIRD_START_X = 600;
 var BIRD_START_Y = 1200;
@@ -334,5 +334,21 @@
 game.onGameOver = function () {
 	resetGame();
 };
 // Initial reset
-resetGame();
\ No newline at end of file
+resetGame();
+// Add shop button to bottom center of the screen
+var shopBtn = new Text2('SHOP', {
+	size: 180,
+	fill: 0xffffff,
+	font: "Impact, Arial Black, Tahoma"
+});
+shopBtn.anchor.set(0.5, 0.5);
+shopBtn.x = 2048 / 2;
+shopBtn.y = 2732 - 180; // 180px above bottom edge for visibility
+game.addChild(shopBtn);
+// Shop button tap handler (currently just a placeholder)
+shopBtn.down = function (x, y, obj) {
+	// TODO: Open shop UI or handle shop logic here
+	// For now, just flash the screen to show it's working
+	LK.effects.flashScreen(0xffff00, 300);
+};
\ No newline at end of file