===================================================================
--- original.js
+++ change.js
@@ -1,176 +1,428 @@
-/****
+/**** 
+* Plugins
+****/ 
+var storage = LK.import("@upit/storage.v1", {
+	selectedShip: 0
+});
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
 * Classes
-****/
+****/ 
 // Asteroid class
 var Asteroid = Container.expand(function () {
-  var self = Container.call(this);
-  var asteroidGraphics = self.attachAsset('asteroid', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 3;
-  self.update = function () {
-    self.y += self.speed;
-    if (self.y > 2732 + asteroidGraphics.height) {
-      self.destroy();
-    }
-  };
+	var self = Container.call(this);
+	var asteroidGraphics = self.attachAsset('asteroid', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 3;
+	self.update = function () {
+		self.y += self.speed;
+		if (self.y > 2732 + asteroidGraphics.height) {
+			self.destroy();
+		}
+	};
 });
 // Enemy class
 var Enemy = Container.expand(function () {
-  var self = Container.call(this);
-  var enemyGraphics = self.attachAsset('enemy', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 5;
-  self.update = function () {
-    self.y += self.speed;
-    if (self.y > 2732 + enemyGraphics.height) {
-      self.destroy();
-    }
-  };
+	var self = Container.call(this);
+	var enemyGraphics = self.attachAsset('enemy', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 5;
+	self.update = function () {
+		self.y += self.speed;
+		if (self.y > 2732 + enemyGraphics.height) {
+			self.destroy();
+		}
+	};
 });
 //<Assets used in the game will automatically appear here>
 // Hero class
 var Hero = Container.expand(function () {
-  var self = Container.call(this);
-  var heroGraphics = self.attachAsset('hero', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = 10;
-  self.update = function () {
-    // Update logic for hero
-  };
-  self.shoot = function () {
-    var bullet = new HeroBullet();
-    bullet.x = self.x;
-    bullet.y = self.y - heroGraphics.height / 2;
-    game.addChild(bullet);
-    heroBullets.push(bullet);
-  };
+	var self = Container.call(this);
+	self.lives = 5;
+	self.lastHit = 0;
+	self.invulnerable = false;
+	self.shipType = storage.selectedShip || 0;
+	var shipAssets = ['hero', 'hero2', 'hero3'];
+	var heroGraphics = self.attachAsset(shipAssets[self.shipType], {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 10;
+	self.changeShip = function (shipIndex) {
+		self.removeChild(heroGraphics);
+		self.shipType = shipIndex;
+		heroGraphics = self.attachAsset(shipAssets[shipIndex], {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+	};
+	self.update = function () {
+		// Handle invulnerability flashing
+		if (self.invulnerable) {
+			heroGraphics.alpha = LK.ticks % 10 < 5 ? 0.5 : 1.0;
+			if (LK.ticks - self.lastHit > 120) {
+				// 2 seconds of invulnerability
+				self.invulnerable = false;
+				heroGraphics.alpha = 1.0;
+			}
+		}
+	};
+	self.takeDamage = function () {
+		if (!self.invulnerable) {
+			self.lives--;
+			self.lastHit = LK.ticks;
+			self.invulnerable = true;
+			LK.effects.flashObject(self, 0xff0000, 500);
+			if (self.lives <= 0) {
+				LK.showGameOver();
+			}
+		}
+	};
+	self.shoot = function () {
+		if (tripleShot && LK.ticks < tripleShootEndTime) {
+			// Triple shot
+			for (var i = -1; i <= 1; i++) {
+				var bullet = new HeroBullet();
+				bullet.x = self.x + i * 50;
+				bullet.y = self.y - heroGraphics.height / 2;
+				game.addChild(bullet);
+				heroBullets.push(bullet);
+			}
+		} else {
+			// Normal shot
+			var bullet = new HeroBullet();
+			bullet.x = self.x;
+			bullet.y = self.y - heroGraphics.height / 2;
+			game.addChild(bullet);
+			heroBullets.push(bullet);
+		}
+	};
+	return self;
 });
 // HeroBullet class
 var HeroBullet = Container.expand(function () {
-  var self = Container.call(this);
-  var bulletGraphics = self.attachAsset('heroBullet', {
-    anchorX: 0.5,
-    anchorY: 0.5
-  });
-  self.speed = -15;
-  self.update = function () {
-    self.y += self.speed;
-    if (self.y < -bulletGraphics.height) {
-      self.destroy();
-    }
-  };
+	var self = Container.call(this);
+	var bulletGraphics = self.attachAsset('heroBullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = -15;
+	self.update = function () {
+		self.y += self.speed;
+		if (self.y < -bulletGraphics.height) {
+			self.destroy();
+		}
+	};
 });
+// PowerUp class
+var PowerUp = Container.expand(function () {
+	var self = Container.call(this);
+	var powerUpGraphics = self.attachAsset('powerUp', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.speed = 4;
+	self.update = function () {
+		self.y += self.speed;
+		if (self.y > 2732 + powerUpGraphics.height) {
+			self.destroy();
+		}
+	};
+	return self;
+});
 
-/****
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-  backgroundColor: 0x000000 //Init game with black background 
+	backgroundColor: 0x000000 //Init game with black background 
 });
 
-/****
+/**** 
 * Game Code
-****/
+****/ 
 // Initialize arrays and variables
 var hero;
 var heroBullets = [];
 var enemies = [];
 var asteroids = [];
+var powerUps = [];
 var score = 0;
-var scoreTxt = new Text2('0', {
-  size: 150,
-  fill: "#ffffff"
-});
-scoreTxt.anchor.set(0.5, 0);
-LK.gui.top.addChild(scoreTxt);
-// Initialize hero
-hero = new Hero();
-hero.x = 2048 / 2;
-hero.y = 2732 - 200;
-game.addChild(hero);
+var gameStarted = false;
+var showingShipSelection = false;
+var tripleShot = false;
+var tripleShootEndTime = 0;
+// UI Elements
+var scoreTxt;
+var livesTxt;
+var startScreen;
+var shipSelectionScreen;
+function createStartScreen() {
+	startScreen = new Container();
+	game.addChild(startScreen);
+	var titleText = new Text2('DEFEND THE GALAXY', {
+		size: 120,
+		fill: 0xFFFFFF
+	});
+	titleText.anchor.set(0.5, 0.5);
+	titleText.x = 2048 / 2;
+	titleText.y = 2732 / 3;
+	startScreen.addChild(titleText);
+	var startButton = new Container();
+	var startButtonBg = LK.getAsset('hero', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		scaleX: 3,
+		scaleY: 1.5
+	});
+	startButton.addChild(startButtonBg);
+	var startButtonText = new Text2('START GAME', {
+		size: 80,
+		fill: 0x000000
+	});
+	startButtonText.anchor.set(0.5, 0.5);
+	startButton.addChild(startButtonText);
+	startButton.x = 2048 / 2;
+	startButton.y = 2732 / 2;
+	startScreen.addChild(startButton);
+	startButton.down = function () {
+		startGame();
+	};
+	var shipsButton = new Container();
+	var shipsButtonBg = LK.getAsset('hero2', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		scaleX: 3,
+		scaleY: 1.5
+	});
+	shipsButton.addChild(shipsButtonBg);
+	var shipsButtonText = new Text2('SHIPS', {
+		size: 80,
+		fill: 0x000000
+	});
+	shipsButtonText.anchor.set(0.5, 0.5);
+	shipsButton.addChild(shipsButtonText);
+	shipsButton.x = 2048 / 2;
+	shipsButton.y = 2732 / 2 + 200;
+	startScreen.addChild(shipsButton);
+	shipsButton.down = function () {
+		showShipSelection();
+	};
+}
+function createShipSelectionScreen() {
+	shipSelectionScreen = new Container();
+	game.addChild(shipSelectionScreen);
+	var titleText = new Text2('SELECT YOUR SHIP', {
+		size: 100,
+		fill: 0xFFFFFF
+	});
+	titleText.anchor.set(0.5, 0.5);
+	titleText.x = 2048 / 2;
+	titleText.y = 400;
+	shipSelectionScreen.addChild(titleText);
+	var shipAssets = ['hero', 'hero2', 'hero3'];
+	var shipColors = ['Blue Fighter', 'Red Cruiser', 'Cyan Interceptor'];
+	for (var i = 0; i < 3; i++) {
+		var shipButton = new Container();
+		var shipGraphics = LK.getAsset(shipAssets[i], {
+			anchorX: 0.5,
+			anchorY: 0.5,
+			scaleX: 2,
+			scaleY: 2
+		});
+		shipButton.addChild(shipGraphics);
+		var shipName = new Text2(shipColors[i], {
+			size: 60,
+			fill: 0xFFFFFF
+		});
+		shipName.anchor.set(0.5, 0.5);
+		shipName.y = 120;
+		shipButton.addChild(shipName);
+		shipButton.x = 2048 / 4 + i * 2048 / 4;
+		shipButton.y = 2732 / 2;
+		shipSelectionScreen.addChild(shipButton);
+		shipButton.shipIndex = i;
+		shipButton.down = function () {
+			storage.selectedShip = this.shipIndex;
+			hideShipSelection();
+		};
+	}
+	var backButton = new Container();
+	var backButtonBg = LK.getAsset('asteroid', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		scaleX: 2,
+		scaleY: 1
+	});
+	backButton.addChild(backButtonBg);
+	var backButtonText = new Text2('BACK', {
+		size: 60,
+		fill: 0xFFFFFF
+	});
+	backButtonText.anchor.set(0.5, 0.5);
+	backButton.addChild(backButtonText);
+	backButton.x = 2048 / 2;
+	backButton.y = 2732 - 300;
+	shipSelectionScreen.addChild(backButton);
+	backButton.down = function () {
+		hideShipSelection();
+	};
+	shipSelectionScreen.visible = false;
+}
+function showShipSelection() {
+	showingShipSelection = true;
+	startScreen.visible = false;
+	shipSelectionScreen.visible = true;
+}
+function hideShipSelection() {
+	showingShipSelection = false;
+	startScreen.visible = true;
+	shipSelectionScreen.visible = false;
+}
+function startGame() {
+	gameStarted = true;
+	startScreen.destroy();
+	shipSelectionScreen.destroy();
+	// Initialize UI
+	scoreTxt = new Text2('Score: 0', {
+		size: 80,
+		fill: 0xFFFFFF
+	});
+	scoreTxt.anchor.set(0.5, 0);
+	LK.gui.top.addChild(scoreTxt);
+	livesTxt = new Text2('Lives: 5', {
+		size: 80,
+		fill: 0xFFFFFF
+	});
+	livesTxt.anchor.set(0.5, 0);
+	livesTxt.y = 100;
+	LK.gui.top.addChild(livesTxt);
+	// Initialize hero
+	hero = new Hero();
+	hero.x = 2048 / 2;
+	hero.y = 2732 - 200;
+	game.addChild(hero);
+}
+// Create screens
+createStartScreen();
+createShipSelectionScreen();
 // Handle game events
-game.down = function (x, y, obj) {
-  hero.x = x;
-  hero.y = y;
-};
 game.move = function (x, y, obj) {
-  hero.x = x;
-  hero.y = y;
+	if (gameStarted && hero) {
+		hero.x = x;
+		hero.y = y;
+	}
 };
-game.up = function (x, y, obj) {
-  // No action needed on up event
-};
 // Update game state
 game.update = function () {
-  // Update hero bullets
-  for (var i = heroBullets.length - 1; i >= 0; i--) {
-    heroBullets[i].update();
-    if (heroBullets[i].y < -heroBullets[i].height) {
-      heroBullets[i].destroy();
-      heroBullets.splice(i, 1);
-    }
-  }
-  // Update enemies
-  for (var i = enemies.length - 1; i >= 0; i--) {
-    enemies[i].update();
-    if (enemies[i].y > 2732 + enemies[i].height) {
-      enemies[i].destroy();
-      enemies.splice(i, 1);
-    }
-  }
-  // Update asteroids
-  for (var i = asteroids.length - 1; i >= 0; i--) {
-    asteroids[i].update();
-    if (asteroids[i].y > 2732 + asteroids[i].height) {
-      asteroids[i].destroy();
-      asteroids.splice(i, 1);
-    }
-  }
-  // Check for collisions
-  for (var i = heroBullets.length - 1; i >= 0; i--) {
-    for (var j = enemies.length - 1; j >= 0; j--) {
-      if (heroBullets[i].intersects(enemies[j])) {
-        heroBullets[i].destroy();
-        enemies[j].destroy();
-        heroBullets.splice(i, 1);
-        enemies.splice(j, 1);
-        score += 10;
-        scoreTxt.setText(score);
-        break;
-      }
-    }
-  }
-  // Spawn enemies
-  if (LK.ticks % 60 == 0) {
-    var enemy = new Enemy();
-    enemy.x = Math.random() * 2048;
-    enemy.y = -enemy.height;
-    game.addChild(enemy);
-    enemies.push(enemy);
-  }
-  // Spawn asteroids
-  if (LK.ticks % 120 == 0) {
-    var asteroid = new Asteroid();
-    asteroid.x = Math.random() * 2048;
-    asteroid.y = -asteroid.height;
-    game.addChild(asteroid);
-    asteroids.push(asteroid);
-  }
-};
-// Shoot bullets
-game.down = function (x, y, obj) {
-  hero.shoot();
-};
-game.move = function (x, y, obj) {
-  hero.x = x;
-  hero.y = y;
-};
-game.up = function (x, y, obj) {
-  // No action needed on up event
+	if (!gameStarted) return;
+	// Automatic shooting
+	if (LK.ticks % 20 == 0) {
+		// Shoot every 20 ticks
+		hero.shoot();
+	}
+	// Update hero bullets
+	for (var i = heroBullets.length - 1; i >= 0; i--) {
+		heroBullets[i].update();
+		if (heroBullets[i].y < -heroBullets[i].height) {
+			heroBullets[i].destroy();
+			heroBullets.splice(i, 1);
+		}
+	}
+	// Update enemies
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		enemies[i].update();
+		if (enemies[i].y > 2732 + enemies[i].height) {
+			enemies[i].destroy();
+			enemies.splice(i, 1);
+		}
+	}
+	// Update asteroids
+	for (var i = asteroids.length - 1; i >= 0; i--) {
+		asteroids[i].update();
+		if (asteroids[i].y > 2732 + asteroids[i].height) {
+			asteroids[i].destroy();
+			asteroids.splice(i, 1);
+		}
+	}
+	// Update power-ups
+	for (var i = powerUps.length - 1; i >= 0; i--) {
+		powerUps[i].update();
+		if (powerUps[i].y > 2732 + powerUps[i].height) {
+			powerUps[i].destroy();
+			powerUps.splice(i, 1);
+		}
+	}
+	// Check bullet vs enemy collisions
+	for (var i = heroBullets.length - 1; i >= 0; i--) {
+		for (var j = enemies.length - 1; j >= 0; j--) {
+			if (heroBullets[i] && enemies[j] && heroBullets[i].intersects(enemies[j])) {
+				heroBullets[i].destroy();
+				enemies[j].destroy();
+				heroBullets.splice(i, 1);
+				enemies.splice(j, 1);
+				score += 10;
+				scoreTxt.setText('Score: ' + score);
+				break;
+			}
+		}
+	}
+	// Check hero vs enemy collisions
+	for (var i = enemies.length - 1; i >= 0; i--) {
+		if (hero.intersects(enemies[i])) {
+			hero.takeDamage();
+			enemies[i].destroy();
+			enemies.splice(i, 1);
+			livesTxt.setText('Lives: ' + hero.lives);
+		}
+	}
+	// Check hero vs asteroid collisions
+	for (var i = asteroids.length - 1; i >= 0; i--) {
+		if (hero.intersects(asteroids[i])) {
+			hero.takeDamage();
+			asteroids[i].destroy();
+			asteroids.splice(i, 1);
+			livesTxt.setText('Lives: ' + hero.lives);
+		}
+	}
+	// Check hero vs power-up collisions
+	for (var i = powerUps.length - 1; i >= 0; i--) {
+		if (hero.intersects(powerUps[i])) {
+			tripleShot = true;
+			tripleShootEndTime = LK.ticks + 600; // 10 seconds at 60fps
+			powerUps[i].destroy();
+			powerUps.splice(i, 1);
+			LK.effects.flashObject(hero, 0x9b59b6, 500);
+		}
+	}
+	// Spawn enemies
+	if (LK.ticks % 60 == 0) {
+		var enemy = new Enemy();
+		enemy.x = Math.random() * 2048;
+		enemy.y = -100;
+		game.addChild(enemy);
+		enemies.push(enemy);
+	}
+	// Spawn asteroids
+	if (LK.ticks % 120 == 0) {
+		var asteroid = new Asteroid();
+		asteroid.x = Math.random() * 2048;
+		asteroid.y = -100;
+		game.addChild(asteroid);
+		asteroids.push(asteroid);
+	}
+	// Spawn power-ups (less frequently)
+	if (LK.ticks % 300 == 0) {
+		// Every 5 seconds
+		var powerUp = new PowerUp();
+		powerUp.x = Math.random() * 2048;
+		powerUp.y = -100;
+		game.addChild(powerUp);
+		powerUps.push(powerUp);
+	}
 };
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