===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,221 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+//Storage library which should be used for persistent game data
+// var storage = LK.import('@upit/storage.v1');
+//Library for using the camera (the background becomes the user's camera video feed) and the microphone. It can access face coordinates for interactive play, as well detect microphone volume / voice interactions
+// var facekit = LK.import('@upit/facekit.v1');
+//Classes can only be defined here. You cannot create inline classes in the games code.
+var Bullet = Container.expand(function () {
+	var self = Container.call(this);
+	//Create and attach asset. This is the same as calling var xxx = self.addChild(LK.getAsset(...))
+	var bulletGraphics = self.attachAsset('bullet', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	//Set bullet speed
+	self.speed = 20; // Bullet speed
+	//If this instance of bullet is attached, this method will be called every tick by the LK engine automatically.
+	//To not manually call .updated methods. If you want to manually call a method every tick on a class, use a different name than update.
+	//As .update is called from the LK engine directly, .update cannot have method arguments.
+	self.update = function () {
+		self.y -= self.speed; // Move bullet upwards
+	};
+	return self; //You must return self if you want other classes to be able to inherit from this class
+});
+//Make a Character class by using the LK expand method to extend Container.
+var PlayerCharacter = Container.expand(function () {
+	var self = Container.call(this);
+	//Get and automatically addChild to self asset with id 'character' with the anchor point set to .5, .5
+	var characterGraphics = self.attachAsset('character', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	return self; //You must return self if you want other classes to be able to inherit from this class
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
 	backgroundColor: 0x000000
-});
\ No newline at end of file
+});
+
+/**** 
+* Game Code
+****/ 
+//Minimalistic tween library which should be used for animations over time, including tinting / colouring an object, scaling, rotating, or changing any game object property.
+//Only include the plugins you need to create the game.
+//We have access to the following plugins. (Note that the variable names used are mandetory for each plugin)
+// Initialize music
+// Blue character
+// Purple alien
+// Yellow bullet
+// Initialize assets used in this game. Scale them according to what is needed for the game.
+// or via static code analysis based on their usage in the code.
+// Assets are automatically created and loaded either dynamically during gameplay
+/* 
+Supported Types:
+1. Shape:
+	- Simple geometric figures with these properties:
+		* width: (required) pixel width of the shape.
+		* height: (required) pixel height of the shape.
+		* color: (required) color of the shape.
+		* shape: (required) type of shape. Valid options: 'box', 'ellipse'.
+2. Image:
+	- Imported images with these properties:
+		* width: (required) pixel resolution width.
+		* height: (required) pixel resolution height.
+		* id: (required) identifier for the image.
+		* flipX: (optional) horizontal flip. Valid values: 0 (no flip), 1 (flip).
+		* flipY: (optional) vertical flip. Valid values: 0 (no flip), 1 (flip).
+		* orientation: (optional) rotation in multiples of 90 degrees, clockwise. Valid values:
+			- 0: No rotation.
+			- 1: Rotate 90 degrees.
+			- 2: Rotate 180 degrees.
+			- 3: Rotate 270 degrees.
+			Note: Width and height remain unchanged upon flipping.
+3. Sound:
+	- Sound effects with these properties:
+			* id: (required) identifier for the sound.
+			* volume: (optional) custom volume. Valid values are a float from 0 to 1.
+4. Music:
+- In contract to sound effects, only one music can be played at a time
+- Music is using the same API to initilize just like sound.
+- Music loops by default
+- Music with these config options:
+		* id: (required) identifier for the sound.
+	* volume: (optional) custom volume. Valid values are a float from 0 to 1.
+	* start: (optional) a float from 0 to 1 used for cropping and indicates the start of the cropping
+	* end: (optional) a float from 0 to 1 used for cropping and indicates the end of the cropping
+*/ 
+//Init game with black background
+//Note game dimensions are 2048x2732
+// Global variables
+var alien;
+var character;
+var bullets = [];
+var scoreTxt;
+var dragNode = null;
+var lastCharacterIntersectingAlien = false;
+var WIN_SCORE = 50; // Score to win
+// Change background color
+game.setBackgroundColor(0x1a1a1a); // Dark grey background
+// Create and position the alien in the center
+alien = game.addChild(LK.getAsset('alien', {
+	anchorX: 0.5,
+	anchorY: 0.5,
+	x: 2048 / 2,
+	y: 2732 / 2
+}));
+alien.lastIntersectingCharacter = false; // Initialize for intersection tracking
+alien.lastIntersectingBullet = false; // Initialize for intersection tracking
+// Create and position the player character at the bottom center
+character = game.addChild(new PlayerCharacter());
+character.x = 2048 / 2;
+character.y = 2732 - character.height / 2 - 100; // Position near bottom
+character.lastIntersectingAlien = false; // Initialize for intersection tracking
+// Create and add score display
+scoreTxt = new Text2('0', {
+	size: 150,
+	fill: 0xFFFFFF
+});
+scoreTxt.setText(LK.getScore());
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Function to handle game move events (dragging character)
+function handleMove(x, y, obj) {
+	if (dragNode) {
+		// Clamp character position to be within the bottom half of the screen
+		dragNode.x = Math.max(dragNode.width / 2, Math.min(2048 - dragNode.width / 2, x));
+		dragNode.y = Math.max(2732 / 2, Math.min(2732 - dragNode.height / 2, y));
+	}
+}
+// Mouse or touch down event on the game object
+game.down = function (x, y, obj) {
+	// Check if the press is on the character
+	var charLocalPos = character.toLocal({
+		x: x,
+		y: y
+	}, game);
+	if (character.containsPoint(charLocalPos)) {
+		dragNode = character;
+		handleMove(x, y, obj); // Call move handler to make it instant
+	}
+};
+// Mouse or touch move event on the game object
+game.move = handleMove;
+// Mouse or touch up event on the game object
+game.up = function (x, y, obj) {
+	dragNode = null;
+};
+// Ask LK engine to update game every game tick
+game.update = function () {
+	// Update and manage bullets
+	for (var i = bullets.length - 1; i >= 0; i--) {
+		var bullet = bullets[i];
+		// We always keep track of last and current values to detect state changes
+		if (bullet.lastY === undefined) bullet.lastY = bullet.y; // Initialize lastY for tracking changes on Y
+		if (bullet.lastIntersectingAlien === undefined) bullet.lastIntersectingAlien = false; // Initialize for intersection tracking
+		// Off-Screen Detection: Destroy bullet if it goes off the top edge
+		if (bullet.lastY >= -bullet.height && bullet.y < -bullet.height) {
+			bullet.destroy(); // Destroy can only be called from the main 'Game' class
+			bullets.splice(i, 1);
+			continue; // Skip further checks for this bullet
+		}
+		// Intersection Detection: Check for bullet collision with alien
+		var currentIntersectingAlien = bullet.intersects(alien);
+		if (!bullet.lastIntersectingAlien && currentIntersectingAlien) {
+			// Intersection just started
+			LK.setScore(LK.getScore() + 1);
+			scoreTxt.setText(LK.getScore());
+			LK.getSound('hit').play(); // Play hit sound
+			// Winning condition
+			if (LK.getScore() >= WIN_SCORE) {
+				LK.showYouWin(); // Show "you win" and reset
+			}
+			bullet.destroy(); // Destroy bullet on hit
+			bullets.splice(i, 1);
+			continue; // Skip further checks for this bullet
+		}
+		// Update last known states
+		bullet.lastY = bullet.y;
+		bullet.lastIntersectingAlien = currentIntersectingAlien;
+	}
+	// Check for character collision with alien
+	var currentCharacterIntersectingAlien = character.intersects(alien);
+	if (!lastCharacterIntersectingAlien && currentCharacterIntersectingAlien) {
+		// Collision just started
+		LK.effects.flashScreen(0xff0000, 1000); // Flash screen red
+		LK.showGameOver(); // Show game over and reset
+	}
+	lastCharacterIntersectingAlien = currentCharacterIntersectingAlien;
+	// Fire a bullet periodically (every 15 ticks = ~4 times per second)
+	if (LK.ticks % 15 == 0) {
+		var newBullet = new Bullet();
+		// We always keep track of last and current values
+		newBullet.x = character.x;
+		newBullet.y = character.y;
+		newBullet.lastY = newBullet.y; // Initialize lastY for tracking changes on Y
+		newBullet.lastIntersectingAlien = newBullet.intersects(alien); // Initialize for intersection tracking
+		bullets.push(newBullet);
+		game.addChild(newBullet);
+		LK.getSound('shoot').play(); // Play shoot sound
+	}
+};
+// Play background music
+LK.playMusic('bgmusic');
+// Legacy event model examples (commented out as per instructions)
+/* 
+Lk.on('tick', function(){
+	//Called every tick.
+})
+game.on('down', function(x,y,obj){
+	console.log("Game was clicked at", x,y)
+})
+*/ 
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