===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,319 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// Item class for all falling items
+var Item = Container.expand(function () {
+	var self = Container.call(this);
+	// Asset id and score are set on creation
+	self.assetId = 'item_basic';
+	self.scoreValue = 1;
+	self.isBad = false; // true for bomb/spike
+	self.isTapped = false;
+	// Attach asset
+	var itemGfx = self.attachAsset(self.assetId, {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// For pop effect
+	self.popEffect = null;
+	// Set up item visuals
+	self.setType = function (type) {
+		// type: {assetId, scoreValue, isBad}
+		self.assetId = type.assetId;
+		self.scoreValue = type.scoreValue;
+		self.isBad = type.isBad;
+		// Remove old asset if any
+		if (itemGfx && itemGfx.parent) itemGfx.parent.removeChild(itemGfx);
+		var newGfx = self.attachAsset(self.assetId, {
+			anchorX: 0.5,
+			anchorY: 0.5
+		});
+		// For bomb/spike, add a little rotation
+		if (self.isBad) {
+			newGfx.rotation = Math.PI / 8 * (Math.random() > 0.5 ? 1 : -1);
+		}
+	};
+	// Animate pop effect
+	self.showPop = function (color) {
+		var pop = LK.getAsset('pop', {
+			anchorX: 0.5,
+			anchorY: 0.5,
+			tint: color
+		});
+		pop.alpha = 0.7;
+		pop.scaleX = pop.scaleY = 0.5;
+		self.addChild(pop);
+		tween(pop, {
+			scaleX: 1.5,
+			scaleY: 1.5,
+			alpha: 0
+		}, {
+			duration: 350,
+			easing: tween.easeOut,
+			onFinish: function onFinish() {
+				if (pop.parent) pop.parent.removeChild(pop);
+			}
+		});
+	};
+	// Called when tapped
+	self.onTap = function () {
+		if (self.isTapped) return;
+		self.isTapped = true;
+		if (self.isBad) {
+			self.showPop(0xff0000);
+		} else {
+			self.showPop(0xffffff);
+		}
+	};
+	// Called every tick
+	self.update = function () {
+		// Movement handled in game loop
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
+	backgroundColor: 0x181818
+});
+
+/**** 
+* Game Code
+****/ 
+// Music
+// Sounds
+// Pop effect
+// Bad items
+// Good items
+// Item types
+var ITEM_TYPES = [{
+	assetId: 'item_basic',
+	scoreValue: 1,
+	isBad: false,
+	weight: 60
+}, {
+	assetId: 'item_rare',
+	scoreValue: 3,
+	isBad: false,
+	weight: 20
+}, {
+	assetId: 'item_legend',
+	scoreValue: 7,
+	isBad: false,
+	weight: 5
+}, {
+	assetId: 'item_bomb',
+	scoreValue: 0,
+	isBad: true,
+	weight: 10
+}, {
+	assetId: 'item_spike',
+	scoreValue: 0,
+	isBad: true,
+	weight: 5
+}];
+// Weighted random selection
+function pickItemType() {
+	var total = 0;
+	for (var i = 0; i < ITEM_TYPES.length; i++) total += ITEM_TYPES[i].weight;
+	var r = Math.random() * total;
+	var acc = 0;
+	for (var i = 0; i < ITEM_TYPES.length; i++) {
+		acc += ITEM_TYPES[i].weight;
+		if (r < acc) return ITEM_TYPES[i];
+	}
+	return ITEM_TYPES[0];
+}
+// Game state
+var items = [];
+var lives = 3;
+var score = 0;
+var spawnInterval = 1000; // ms
+var minSpawnInterval = 350;
+var spawnTimer = null;
+var itemFallSpeed = 7; // px per frame
+var itemSpeedInc = 0.15;
+var itemSpawnDec = 30;
+var lastTapTime = 0;
+// GUI
+var scoreTxt = new Text2('0', {
+	size: 120,
+	fill: "#fff"
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+var livesTxt = new Text2('♥♥♥', {
+	size: 90,
+	fill: 0xFF5252
+});
+livesTxt.anchor.set(1, 0);
+livesTxt.x = -40; // right padding
+LK.gui.topRight.addChild(livesTxt);
+// Prevent elements in top left 100x100
+// (No elements added to gui.topLeft or at (0,0))
+// Music
+LK.playMusic('bgmusic');
+// Spawn a new item
+function spawnItem() {
+	var type = pickItemType();
+	var item = new Item();
+	item.setType(type);
+	// Random X, avoid edges
+	var margin = 120;
+	var x = margin + Math.random() * (2048 - 2 * margin);
+	item.x = x;
+	item.y = -100;
+	// For touch detection
+	item.width = LK.getAsset(type.assetId, {
+		anchorX: 0.5,
+		anchorY: 0.5
+	}).width;
+	item.height = LK.getAsset(type.assetId, {
+		anchorX: 0.5,
+		anchorY: 0.5
+	}).height;
+	// Add to game
+	game.addChild(item);
+	items.push(item);
+}
+// Update lives display
+function updateLives() {
+	var s = '';
+	for (var i = 0; i < lives; i++) s += '♥';
+	livesTxt.setText(s);
+}
+// Handle tap
+function handleTap(x, y, obj) {
+	// Find topmost item under tap
+	for (var i = items.length - 1; i >= 0; i--) {
+		var item = items[i];
+		// Simple bounding box check
+		var dx = x - item.x;
+		var dy = y - item.y;
+		var w = item.width / 2;
+		var h = item.height / 2;
+		if (dx * dx / (w * w) + dy * dy / (h * h) <= 1.1) {
+			// Tapped this item
+			if (item.isTapped) continue;
+			item.onTap();
+			if (item.isBad) {
+				// Lose a life
+				lives--;
+				updateLives();
+				LK.getSound('bad').play();
+				LK.effects.flashScreen(0xff0000, 350);
+				if (lives <= 0) {
+					LK.getSound('lose').play();
+					LK.showGameOver();
+					return;
+				}
+			} else {
+				// Score!
+				score += item.scoreValue;
+				LK.setScore(score);
+				scoreTxt.setText(score);
+				LK.getSound('score').play();
+				// Animate item
+				tween(item, {
+					scaleX: 1.3,
+					scaleY: 1.3,
+					alpha: 0
+				}, {
+					duration: 220,
+					easing: tween.easeOut,
+					onFinish: function onFinish() {
+						if (item.parent) item.parent.removeChild(item);
+					}
+				});
+			}
+			// Remove item from array
+			items.splice(i, 1);
+			break;
+		}
+	}
+}
+// Game move/tap handler
+game.down = function (x, y, obj) {
+	handleTap(x, y, obj);
+};
+// Main update loop
+game.update = function () {
+	// Move items
+	for (var i = items.length - 1; i >= 0; i--) {
+		var item = items[i];
+		item.y += itemFallSpeed;
+		// If not tapped and off screen
+		if (!item.isTapped && item.y > 2732 + 100) {
+			// If good item missed, lose a life
+			if (!item.isBad) {
+				lives--;
+				updateLives();
+				LK.getSound('life').play();
+				LK.effects.flashScreen(0xff9800, 250);
+				if (lives <= 0) {
+					LK.getSound('lose').play();
+					LK.showGameOver();
+					return;
+				}
+			}
+			// Remove from game
+			if (item.parent) item.parent.removeChild(item);
+			items.splice(i, 1);
+		}
+	}
+	// Difficulty ramp: every 10 points, increase speed and spawn rate
+	var level = Math.floor(score / 10);
+	var targetSpeed = 7 + level * itemSpeedInc;
+	if (itemFallSpeed < targetSpeed) itemFallSpeed += 0.02;
+	var targetInterval = Math.max(minSpawnInterval, 1000 - level * itemSpawnDec);
+	if (spawnInterval > targetInterval) spawnInterval -= 1.5;
+};
+// Spawn timer
+function startSpawnTimer() {
+	if (spawnTimer) LK.clearInterval(spawnTimer);
+	spawnTimer = LK.setInterval(function () {
+		spawnItem();
+		// Adjust interval
+		LK.clearInterval(spawnTimer);
+		startSpawnTimer();
+	}, spawnInterval);
+}
+startSpawnTimer();
+// Reset on game over
+LK.on('gameover', function () {
+	// Clean up
+	for (var i = 0; i < items.length; i++) {
+		if (items[i].parent) items[i].parent.removeChild(items[i]);
+	}
+	items = [];
+	lives = 3;
+	score = 0;
+	spawnInterval = 1000;
+	itemFallSpeed = 7;
+	updateLives();
+	scoreTxt.setText(score);
+	startSpawnTimer();
+	LK.playMusic('bgmusic');
+});
+// Reset on win (not used, but for completeness)
+LK.on('youwin', function () {
+	for (var i = 0; i < items.length; i++) {
+		if (items[i].parent) items[i].parent.removeChild(items[i]);
+	}
+	items = [];
+	lives = 3;
+	score = 0;
+	spawnInterval = 1000;
+	itemFallSpeed = 7;
+	updateLives();
+	scoreTxt.setText(score);
+	startSpawnTimer();
+	LK.playMusic('bgmusic');
 });
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