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

/**** 
* Classes
****/ 
// Monster: Enemy advancing from the top
var Monster = Container.expand(function () {
	var self = Container.call(this);
	// Attach monster asset (box/ellipse)
	var monsterAsset = self.attachAsset('monster', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: self.monsterSize,
		height: self.monsterSize
	});
	// Health points
	self.hp = self.maxHp;
	// Called every tick
	self.update = function () {
		// Monsters only move forward if not destroyed
		if (!self.destroyed) {
			// Move toward hero using direction vector if set
			if (typeof self.dirX === "number" && typeof self.dirY === "number") {
				self.x += self.dirX * self.speed;
				self.y += self.dirY * self.speed;
			} else {
				// fallback: move down
				self.y += self.speed;
			}
		}
	};
	// Take damage
	self.hit = function () {
		self.hp -= 1;
		if (self.hp <= 0) {
			self.destroyed = true;
			// Animate scale up and fade out for death effect
			tween(self, {
				alpha: 0,
				scaleX: 1.7,
				scaleY: 1.7
			}, {
				duration: 220,
				onFinish: function onFinish() {
					self.destroy();
				}
			});
		} else {
			// Flash red
			tween(monsterAsset, {
				tint: 0xff4444
			}, {
				duration: 80,
				onFinish: function onFinish() {
					tween(monsterAsset, {
						tint: self.baseColor
					}, {
						duration: 120
					});
				}
			});
		}
	};
	return self;
});
// Note: Falling note that must be hit in time
var Note = Container.expand(function () {
	var self = Container.call(this);
	// Pick a random note asset for this note
	var noteAssetId = 'note' + (1 + Math.floor(Math.random() * 4));
	self.noteAssetId = noteAssetId;
	var noteAsset = self.attachAsset(noteAssetId, {
		anchorX: 0.5,
		anchorY: 0.5,
		width: self.noteSize,
		height: self.noteSize
	});
	// Index of the key this note targets
	self.keyIndex = typeof self.keyIndex !== "undefined" ? self.keyIndex : self.index;
	// Used for hit/miss detection
	self.active = true;
	// Called every tick
	self.update = function () {
		// Notes always fall straight down toward their assigned key
		self.y += self.speed;
		// Find the key this note is assigned to
		var key = typeof self.keyIndex !== "undefined" && self.keyIndex >= 0 && self.keyIndex < NUM_KEYS ? pianoKeys[self.keyIndex] : null;
		if (key) {
			var missY = key.y + KEY_HEIGHT + NOTE_SIZE / 2;
			// If note crosses the bottom boundary and is still active, mark as miss and destroy
			if (self.y > missY && self.active) {
				self.active = false;
				// Register miss
				missCount += 1;
				missTxt.setText('Misses: ' + missCount);
				LK.effects.flashObject(hero, 0xff4444, 200);
				checkGameOver();
				self.destroy();
			}
		} else {
			// Defensive: If key is missing, just destroy the note
			self.destroy();
		}
	};
	return self;
});
// PianoKey: Represents a single piano key at the bottom
var PianoKey = Container.expand(function () {
	var self = Container.call(this);
	// Defensive: Set defaults if not set
	if (typeof self.assetId === "undefined") {
		self.assetId = 'key_piano';
	}
	if (typeof self.keyWidth === "undefined") {
		self.keyWidth = KEY_WIDTH;
	}
	if (typeof self.keyHeight === "undefined") {
		self.keyHeight = KEY_HEIGHT;
	}
	if (typeof self.baseColor === "undefined") {
		self.baseColor = 0xffffff;
	}
	if (typeof self.index === "undefined") {
		self.index = 0;
	}
	// Attach key asset (always key_piano)
	var keyAsset = self.attachAsset(self.assetId, {
		anchorX: 0.5,
		anchorY: 0,
		width: self.keyWidth,
		height: self.keyHeight
	});
	// Store index for reference
	self.keyIndex = self.index;
	// Set initial dim state
	keyAsset.alpha = 0.45;
	// Visual feedback for press
	self.flash = function () {
		// Light up key
		tween(keyAsset, {
			alpha: 1
		}, {
			duration: 60,
			onFinish: function onFinish() {
				// Return to dim after a short time
				tween(keyAsset, {
					alpha: 0.45
				}, {
					duration: 120
				});
			}
		});
	};
	return self;
});
// Projectile: Fired by hero toward a monster
var Projectile = Container.expand(function () {
	var self = Container.call(this);
	// Defensive: Set defaults if not set
	if (typeof self.size === "undefined") {
		self.size = PROJECTILE_SIZE;
	}
	if (typeof self.speed === "undefined") {
		self.speed = PROJECTILE_SPEED;
	}
	// Attach bullet asset
	var projAsset = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: self.size,
		height: self.size
	});
	// Target monster (set externally)
	self.target = null;
	// Called every tick
	self.update = function () {
		// If no target or target destroyed, fade out and destroy
		if (!self.target || self.target.destroyed || !self.target.parent) {
			tween(self, {
				alpha: 0,
				scaleX: 1.5,
				scaleY: 1.5
			}, {
				duration: 120,
				onFinish: function onFinish() {
					self.destroy();
				}
			});
			return;
		}
		// Move toward target
		var dx = self.target.x - self.x;
		var dy = self.target.y - self.y;
		var dist = Math.sqrt(dx * dx + dy * dy);
		if (dist < self.speed) {
			// Arrived at target: hit!
			if (typeof self.target.hit === "function") {
				self.target.hit();
			}
			// Impact effect
			tween(self, {
				alpha: 0,
				scaleX: 1.7,
				scaleY: 1.7
			}, {
				duration: 120,
				onFinish: function onFinish() {
					self.destroy();
				}
			});
			return;
		}
		// Move toward target
		self.x += dx / dist * self.speed;
		self.y += dy / dist * self.speed;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x181830
});

===================================================================
--- original.js
+++ change.js
@@ -224,173 +224,5 @@
 * Initialize Game
 ****/ 
 var game = new LK.Game({
 	backgroundColor: 0x181830
-});
-
-/**** 
-* Game Code
-****/ 
-// --- Game Constants ---
-var NUM_KEYS = 5;
-var KEY_WIDTH = 350;
-var KEY_HEIGHT = 200;
-var NOTE_SIZE = 140; // Increased size for notes
-var PROJECTILE_SIZE = 120;
-var PROJECTILE_SPEED = 32;
-// --- Game State ---
-var pianoKeys = [];
-var notes = [];
-var monsters = [];
-var projectiles = [];
-var missCount = 0;
-var missTxt;
-var hero;
-var noteTimer;
-var monsterTimer;
-// --- UI ---
-var scoreTxt = new Text2('Score: 0', {
-	size: 100,
-	fill: "#fff"
-});
-scoreTxt.anchor.set(0.5, 0);
-LK.gui.top.addChild(scoreTxt);
-missTxt = new Text2('Misses: 0', {
-	size: 80,
-	fill: 0xFF4444
-});
-missTxt.anchor.set(0.5, 0);
-LK.gui.top.addChild(missTxt);
-missTxt.y = 120;
-// --- Hero ---
-hero = new Container();
-var heroAsset = hero.attachAsset('hero', {
-	anchorX: 0.5,
-	anchorY: 1,
-	width: 250,
-	height: 250
-});
-hero.x = 2048 / 2;
-hero.y = 2732 - KEY_HEIGHT - 80;
-game.addChild(hero);
-// --- Piano Keys ---
-var keySpacing = 2048 / NUM_KEYS;
-for (var i = 0; i < NUM_KEYS; i++) {
-	var key = new PianoKey();
-	key.index = i;
-	key.keyWidth = KEY_WIDTH;
-	key.keyHeight = KEY_HEIGHT;
-	key.x = keySpacing * (i + 0.5);
-	key.y = 2732 - KEY_HEIGHT;
-	pianoKeys.push(key);
-	game.addChild(key);
-}
-// --- Note Spawner ---
-function spawnNote() {
-	var idx = Math.floor(Math.random() * NUM_KEYS);
-	var note = new Note();
-	note.noteSize = NOTE_SIZE;
-	note.keyIndex = idx;
-	note.x = pianoKeys[idx].x;
-	note.y = -NOTE_SIZE / 2;
-	note.speed = 16;
-	notes.push(note);
-	game.addChild(note);
-}
-noteTimer = LK.setInterval(spawnNote, 900);
-// --- Monster Spawner ---
-function spawnMonster() {
-	var idx = Math.floor(Math.random() * NUM_KEYS);
-	var monster = new Monster();
-	monster.monsterSize = 150;
-	monster.maxHp = 2;
-	monster.hp = monster.maxHp;
-	monster.baseColor = 0xffffff;
-	monster.x = pianoKeys[idx].x;
-	monster.y = -monster.monsterSize / 2;
-	monster.speed = 6 + Math.random() * 2;
-	monsters.push(monster);
-	game.addChild(monster);
-}
-monsterTimer = LK.setInterval(spawnMonster, 2500);
-// --- Game Over Check ---
-function checkGameOver() {
-	if (missCount >= 5) {
-		LK.effects.flashScreen(0xff0000, 1000);
-		LK.showGameOver();
-	}
-}
-// --- Input Handling ---
-game.down = function (x, y, obj) {
-	// Find which key was pressed
-	for (var i = 0; i < pianoKeys.length; i++) {
-		var key = pianoKeys[i];
-		var keyBounds = {
-			left: key.x - KEY_WIDTH / 2,
-			right: key.x + KEY_WIDTH / 2,
-			top: key.y,
-			bottom: key.y + KEY_HEIGHT
-		};
-		if (x >= keyBounds.left && x <= keyBounds.right && y >= keyBounds.top && y <= keyBounds.bottom) {
-			key.flash();
-			// Check for note hit
-			for (var j = 0; j < notes.length; j++) {
-				var note = notes[j];
-				if (!note.active) continue;
-				var distY = Math.abs(note.y - (key.y + KEY_HEIGHT / 2));
-				if (note.keyIndex === i && distY < NOTE_SIZE / 1.5) {
-					note.active = false;
-					LK.setScore(LK.getScore() + 1);
-					scoreTxt.setText('Score: ' + LK.getScore());
-					LK.effects.flashObject(hero, 0x44ff44, 120);
-					note.destroy();
-					notes.splice(j, 1);
-					// Fire projectile at monster in this lane
-					for (var k = 0; k < monsters.length; k++) {
-						var m = monsters[k];
-						if (!m.destroyed && Math.abs(m.x - key.x) < 10) {
-							var proj = new Projectile();
-							proj.size = PROJECTILE_SIZE;
-							proj.speed = PROJECTILE_SPEED;
-							proj.x = hero.x;
-							proj.y = hero.y - 120;
-							proj.target = m;
-							projectiles.push(proj);
-							game.addChild(proj);
-							break;
-						}
-					}
-					return;
-				}
-			}
-		}
-	}
-};
-// --- Main Game Loop ---
-game.update = function () {
-	// Update notes
-	for (var i = notes.length - 1; i >= 0; i--) {
-		var note = notes[i];
-		note.update();
-		if (!note.parent) notes.splice(i, 1);
-	}
-	// Update monsters
-	for (var i = monsters.length - 1; i >= 0; i--) {
-		var monster = monsters[i];
-		monster.update();
-		if (monster.destroyed && !monster.parent) monsters.splice(i, 1);
-		// If monster reaches bottom, game over
-		if (!monster.destroyed && monster.y > 2732 - KEY_HEIGHT - 80) {
-			LK.effects.flashScreen(0xff0000, 1000);
-			LK.showGameOver();
-			return;
-		}
-	}
-	// Update projectiles
-	for (var i = projectiles.length - 1; i >= 0; i--) {
-		var proj = projectiles[i];
-		proj.update();
-		if (!proj.parent) projectiles.splice(i, 1);
-	}
-};
-// --- Music ---
-LK.playMusic('gamemusic');
\ No newline at end of file
+});
\ No newline at end of file