/**** 
* Classes
****/
// HeroBullet class representing the hero's projectiles
var HeroBullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletGraphics = self.createAsset('heroBullet', 'Hero Bullet', 0.5, 0.5);
	self.speed = -10;
	self.move = function () {
		if (!hero.isTimestopped || self.timestopActive) {
			self.y += self.speed;
		}
	};
	self.timestopActive = false;
	self.activateTimestop = function () {
		self.timestopActive = true;
		LK.setTimeout(function () {
			self.timestopActive = false;
		}, 100);
	};
	self.isOffScreen = function () {
		return self.y < -self.height;
	};
});
// Hero class representing the main character
var Hero = Container.expand(function () {
	var self = Container.call(this);
	self.shoot = function () {
		var bullet = new HeroBullet();
		bullet.x = self.x;
		bullet.y = self.y - self.height / 2;
		game.addChild(bullet);
		return bullet;
	};
	var heroGraphics = self.createAsset('jojoHero', 'Main Hero', 0.5, 0.5);
	self.speed = 5;
	self.isTimestopped = false;
	self.timestopDuration = 3000; // Initial timestop duration
	self.move = function (direction) {
		if (self.isTimestopped) {
			return;
		}
		if (direction === 'left') {
			self.x -= self.speed;
		}
		if (direction === 'right') {
			self.x += self.speed;
		}
		if (direction === 'up') {
			self.y -= self.speed;
		}
		if (direction === 'down') {
			self.y += self.speed;
		}
	};
	self.timestop = function () {
		self.isTimestopped = true;
		heroBullets.forEach(function (bullet) {
			bullet.activateTimestop();
		});
		LK.setTimeout(function () {
			self.isTimestopped = false;
		}, self.timestopDuration);
	};
});
// Enemy class representing the adversaries
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	var enemyGraphics = self.createAsset('jojoEnemy', 'Enemy Character', 0.5, 0.5);
	self.speed = 2;
	self.move = function () {
		if (hero.isTimestopped) {
			return;
		}
		self.y += self.speed;
	};
});
var Shop = Container.expand(function () {
	var self = Container.call(this);
	var shopGraphics = self.createAsset('shopBackground', 'Shop Background', 0.5, 0.5);
	self.visible = false;
	self.upgrades = {
		timestopDuration: {
			cost: 100,
			effect: function effect() {
				hero.timestopDuration += 1000;
			}
		},
		enemySpawnRate: {
			cost: 100,
			effect: function effect() {
				game.enemySpawnRate += 30;
			}
		}
	};
	self.show = function () {
		self.visible = true;
		game.paused = true;
	};
	self.hide = function () {
		self.visible = false;
		game.paused = false;
	};
	self.purchaseUpgrade = function (upgrade) {
		if (score >= self.upgrades[upgrade].cost) {
			updateScore(-self.upgrades[upgrade].cost);
			self.upgrades[upgrade].effect();
		}
	};
});

/**** 
* Initialize Game
****/
var game = new LK.Game({
	backgroundColor: 0x000000,
	// Init game with black background
	paused: false,
	enemySpawnRate: 120 // Initial spawn rate
});

/**** 
* Game Code
****/
var shop = game.addChild(new Shop());

// Initialize hero
var hero = game.addChild(new Hero());
hero.x = game.width / 2;
hero.y = game.height - 100;

// Initialize enemies array
var enemies = [];
// Initialize hero bullets array
var heroBullets = [];

// Initialize score
var score = 0;
var scoreTxt = new Text2(score.toString(), {
	size: 150,
	fill: "#ffffff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);

// Function to update score
function updateScore(value) {
	score += value;
	scoreTxt.setText(score.toString());
}

// Function to spawn enemies
function spawnEnemy() {
	var enemy = new Enemy();
	enemy.x = Math.random() * (game.width - enemy.width) + enemy.width / 2;
	enemy.y = -enemy.height;
	enemies.push(enemy);
	game.addChild(enemy);
}

// Event listener for touch events on the hero
hero.on('down', function (obj) {
	var bullet = hero.shoot();
	heroBullets.push(bullet);
});

// Event listener for right-click events on the game area to trigger timestop
game.on('rightdown', function (obj) {
	hero.timestop();
}); // Event listener for two-finger tap events on the game area to open the shop
// Note: LK does not have a 'tap' event, so we simulate it with 'down' and 'up' events
var touchCount = 0;
game.on('down', function (obj) {
	touchCount++;
	if (touchCount === 2) {
		shop.show();
	}
});
game.on('up', function (obj) {
	touchCount = 0;
});

// Event listener for touch move events on the game area
game.on('move', function (obj) {
	var pos = obj.event.getLocalPosition(game);
	hero.x = pos.x;
	hero.y = pos.y;
});

// Main game loop
LK.on('tick', function () {
	if (game.paused) {
		return;
	}
	// Move hero based on touch input (handled by event listeners)
	// Move enemies
	for (var i = enemies.length - 1; i >= 0; i--) {
		enemies[i].move();
		// Check for collision with hero
		if (enemies[i].intersects(hero)) {
			LK.effects.flashScreen(0xff0000, 500);
			LK.showGameOver();
			return;
		}
		// Remove enemies that are off-screen
		if (enemies[i].y > game.height + enemies[i].height) {
			enemies[i].destroy();
			enemies.splice(i, 1);
			updateScore(-1);
		}
	}
	// Move hero bullets
	for (var b = heroBullets.length - 1; b >= 0; b--) {
		heroBullets[b].move();
		// Check for collision with enemies
		for (var e = enemies.length - 1; e >= 0; e--) {
			if (heroBullets[b].intersects(enemies[e])) {
				enemies[e].destroy();
				enemies.splice(e, 1);
				updateScore(1);
			}
		}
		// Remove bullets that are off-screen
		if (heroBullets[b].isOffScreen()) {
			heroBullets[b].destroy();
			heroBullets.splice(b, 1);
		}
	}

	// Spawn enemies at random intervals
	if (LK.ticks % game.enemySpawnRate === 0) {
		spawnEnemy();
	}
});

===================================================================
--- original.js
+++ change.js
@@ -34,8 +34,9 @@
 	};
 	var heroGraphics = self.createAsset('jojoHero', 'Main Hero', 0.5, 0.5);
 	self.speed = 5;
 	self.isTimestopped = false;
+	self.timestopDuration = 3000; // Initial timestop duration
 	self.move = function (direction) {
 		if (self.isTimestopped) {
 			return;
 		}
@@ -58,9 +59,9 @@
 			bullet.activateTimestop();
 		});
 		LK.setTimeout(function () {
 			self.isTimestopped = false;
-		}, 3000); // Timestop effect lasts for 3 seconds
+		}, self.timestopDuration);
 	};
 });
 // Enemy class representing the adversaries
 var Enemy = Container.expand(function () {
@@ -73,19 +74,57 @@
 		}
 		self.y += self.speed;
 	};
 });
+var Shop = Container.expand(function () {
+	var self = Container.call(this);
+	var shopGraphics = self.createAsset('shopBackground', 'Shop Background', 0.5, 0.5);
+	self.visible = false;
+	self.upgrades = {
+		timestopDuration: {
+			cost: 100,
+			effect: function effect() {
+				hero.timestopDuration += 1000;
+			}
+		},
+		enemySpawnRate: {
+			cost: 100,
+			effect: function effect() {
+				game.enemySpawnRate += 30;
+			}
+		}
+	};
+	self.show = function () {
+		self.visible = true;
+		game.paused = true;
+	};
+	self.hide = function () {
+		self.visible = false;
+		game.paused = false;
+	};
+	self.purchaseUpgrade = function (upgrade) {
+		if (score >= self.upgrades[upgrade].cost) {
+			updateScore(-self.upgrades[upgrade].cost);
+			self.upgrades[upgrade].effect();
+		}
+	};
+});
 
 /**** 
 * Initialize Game
 ****/
 var game = new LK.Game({
-	backgroundColor: 0x000000 // Init game with black background
+	backgroundColor: 0x000000,
+	// Init game with black background
+	paused: false,
+	enemySpawnRate: 120 // Initial spawn rate
 });
 
 /**** 
 * Game Code
 ****/
+var shop = game.addChild(new Shop());
+
 // Initialize hero
 var hero = game.addChild(new Hero());
 hero.x = game.width / 2;
 hero.y = game.height - 100;
@@ -127,9 +166,20 @@
 
 // Event listener for right-click events on the game area to trigger timestop
 game.on('rightdown', function (obj) {
 	hero.timestop();
+}); // Event listener for two-finger tap events on the game area to open the shop
+// Note: LK does not have a 'tap' event, so we simulate it with 'down' and 'up' events
+var touchCount = 0;
+game.on('down', function (obj) {
+	touchCount++;
+	if (touchCount === 2) {
+		shop.show();
+	}
 });
+game.on('up', function (obj) {
+	touchCount = 0;
+});
 
 // Event listener for touch move events on the game area
 game.on('move', function (obj) {
 	var pos = obj.event.getLocalPosition(game);
@@ -138,8 +188,11 @@
 });
 
 // Main game loop
 LK.on('tick', function () {
+	if (game.paused) {
+		return;
+	}
 	// Move hero based on touch input (handled by event listeners)
 	// Move enemies
 	for (var i = enemies.length - 1; i >= 0; i--) {
 		enemies[i].move();
@@ -174,9 +227,8 @@
 		}
 	}
 
 	// Spawn enemies at random intervals
-	if (LK.ticks % 120 === 0) {
-		// Every 2 seconds
+	if (LK.ticks % game.enemySpawnRate === 0) {
 		spawnEnemy();
 	}
 });
\ No newline at end of file