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

/**** 
* Classes
****/ 
var FallingBomb = Container.expand(function (lane) {
	var self = Container.call(this);
	var bombGraphics = self.attachAsset('bomb', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.lane = lane;
	self.speed = 8;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var FallingNote = Container.expand(function (noteType, lane) {
	var self = Container.call(this);
	var noteGraphics = self.attachAsset('note' + noteType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.lane = lane;
	self.speed = 8;
	self.noteType = noteType;
	self.update = function () {
		self.y += self.speed;
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.currentLane = 3;
	self.shieldActive = false;
	self.shieldTimer = 0;
	self.shieldEffect = null;
	self.update = function () {
		if (self.shieldActive) {
			self.shieldTimer--;
			// Update shield effect position to follow player
			if (self.shieldEffect) {
				self.shieldEffect.x = self.x;
				self.shieldEffect.y = self.y;
			}
			if (self.shieldTimer <= 0) {
				self.shieldActive = false;
				playerGraphics.tint = 0xFFFFFF;
				shieldUI.container.visible = false;
				// Remove shield effect when shield ends
				if (self.shieldEffect) {
					self.shieldEffect.destroy();
					self.shieldEffect = null;
				}
			} else {
				// Update shield timer bar
				var progress = self.shieldTimer / 300; // 300 is max shield time
				shieldUI.barFg.width = 300 * progress;
			}
		} else {
			shieldUI.container.visible = false;
		}
	};
	self.activateShield = function () {
		self.shieldActive = true;
		self.shieldTimer = 300; // 5 seconds at 60fps
		playerGraphics.tint = 0xFFD700;
		shieldUI.container.visible = true;
		shieldUI.barFg.width = 300;
		// Remove any existing shield effect first
		if (self.shieldEffect) {
			self.shieldEffect.destroy();
			self.shieldEffect = null;
		}
		// Create shield activation effect that persists only when shield is active
		if (self.shieldActive) {
			self.shieldEffect = new ShieldEffect();
			self.shieldEffect.x = self.x;
			self.shieldEffect.y = self.y;
			game.addChild(self.shieldEffect);
			self.shieldEffect.startEffect();
		}
	};
	return self;
});
var ShieldEffect = Container.expand(function () {
	var self = Container.call(this);
	var effectGraphics = self.attachAsset('shieldEffect', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	effectGraphics.alpha = 0.7;
	effectGraphics.scaleX = 1.2;
	effectGraphics.scaleY = 1.2;
	self.animationDirection = 1;
	self.update = function () {
		// Continuous pulsing animation while shield is active
		effectGraphics.rotation += 0.05;
		effectGraphics.scaleX += 0.01 * self.animationDirection;
		effectGraphics.scaleY += 0.01 * self.animationDirection;
		if (effectGraphics.scaleX >= 1.4) {
			self.animationDirection = -1;
		} else if (effectGraphics.scaleX <= 1.0) {
			self.animationDirection = 1;
		}
	};
	self.startEffect = function () {
		// Initial pulse effect
		tween(effectGraphics, {
			alpha: 0.7
		}, {
			duration: 300,
			easing: tween.easeOut
		});
	};
	return self;
});
var ShieldPowerup = Container.expand(function (lane) {
	var self = Container.call(this);
	var shieldGraphics = self.attachAsset('shield', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.lane = lane;
	self.speed = 6;
	self.update = function () {
		self.y += self.speed;
		shieldGraphics.rotation += 0.1;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x2C3E50
});

/**** 
* Game Code
****/ 
var player;
var staircases = [];
var fallingNotes = [];
var fallingBombs = [];
var shieldPowerups = [];
var hearts = [];
var scoreTxt;
var heartsTxt;
var shieldUI = {};
var playerHealth = 3;
var gameSpeed = 1;
var spawnTimer = 0;
var bombSpawnChance = 0.15;
var shieldSpawnChance = 0.05;
var shieldSpawned = false;
var musicStarted = false;
var lanePositions = [];
var laneWidth = 2048 / 7;
// Calculate lane positions
for (var i = 0; i < 7; i++) {
	lanePositions[i] = i * laneWidth + laneWidth / 2;
}
// Create staircases
for (var i = 0; i < 7; i++) {
	var staircase = game.addChild(LK.getAsset('staircase', {
		anchorX: 0.5,
		anchorY: 0.5
	}));
	staircase.x = lanePositions[i];
	staircase.y = 2732 - 100;
	staircase.width = laneWidth - 20; // Make each staircase fit its lane with small gap
	staircase.height = 2000; // Set appropriate height for individual staircases (1000% increase)
	staircases.push(staircase);
}
// Create tunnel at top
var tunnel = game.addChild(LK.getAsset('tunnel', {
	anchorX: 0.5,
	anchorY: 1
}));
tunnel.x = 2048 / 2;
tunnel.y = 200;
// Create player
player = game.addChild(new Player());
player.x = lanePositions[player.currentLane];
player.y = 2732 - 100 - 740; // Position player lower on the staircase
// Create UI
scoreTxt = new Text2('Score: 0', {
	size: 80,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
heartsTxt = new Text2('♥ ♥ ♥', {
	size: 80,
	fill: 0xFF0000
});
heartsTxt.anchor.set(1, 0);
LK.gui.topRight.addChild(heartsTxt);
// Create shield UI
shieldUI.container = new Container();
shieldUI.container.visible = false;
LK.gui.topRight.addChild(shieldUI.container);
shieldUI.text = new Text2('SHIELD', {
	size: 80,
	fill: 0xFFD700
});
shieldUI.text.anchor.set(1, 0);
shieldUI.text.x = 0;
shieldUI.text.y = 100;
shieldUI.container.addChild(shieldUI.text);
// Shield timer bar background
shieldUI.barBg = LK.getAsset('staircase', {
	anchorX: 1,
	anchorY: 0
});
shieldUI.barBg.x = 0;
shieldUI.barBg.y = 180;
shieldUI.barBg.width = 300;
shieldUI.barBg.height = 30;
shieldUI.barBg.tint = 0x333333;
shieldUI.container.addChild(shieldUI.barBg);
// Shield timer bar foreground
shieldUI.barFg = LK.getAsset('staircase', {
	anchorX: 1,
	anchorY: 0
});
shieldUI.barFg.x = 0;
shieldUI.barFg.y = 180;
shieldUI.barFg.width = 300;
shieldUI.barFg.height = 30;
shieldUI.barFg.tint = 0xFF0000;
shieldUI.container.addChild(shieldUI.barFg);
function updateHeartsDisplay() {
	var heartsText = '';
	for (var i = 0; i < playerHealth; i++) {
		heartsText += '♥ ';
	}
	heartsTxt.setText(heartsText);
}
function spawnFallingObject() {
	var lane = Math.floor(Math.random() * 7);
	var x = lanePositions[lane];
	var spawnY = 150; // Spawn from bottom of tunnel
	if (Math.random() < shieldSpawnChance && !shieldSpawned) {
		// Spawn shield powerup
		var shield = new ShieldPowerup(lane);
		shield.x = x;
		shield.y = spawnY;
		shieldPowerups.push(shield);
		game.addChild(shield);
		shieldSpawned = true;
	} else if (Math.random() < bombSpawnChance) {
		// Spawn bomb
		var bomb = new FallingBomb(lane);
		bomb.x = x;
		bomb.y = spawnY;
		fallingBombs.push(bomb);
		game.addChild(bomb);
	} else {
		// Spawn note
		var noteType = Math.floor(Math.random() * 7) + 1;
		var note = new FallingNote(noteType, lane);
		note.x = x;
		note.y = spawnY;
		fallingNotes.push(note);
		game.addChild(note);
	}
}
function movePlayer(targetLane) {
	if (targetLane >= 0 && targetLane < 7) {
		player.currentLane = targetLane;
		tween(player, {
			x: lanePositions[targetLane]
		}, {
			duration: 200,
			easing: tween.easeOut
		});
	}
}
game.down = function (x, y, obj) {
	var clickedLane = Math.floor(x / laneWidth);
	movePlayer(clickedLane);
};
game.update = function () {
	// Spawn falling objects
	spawnTimer++;
	if (spawnTimer >= Math.max(30 - Math.floor(LK.ticks / 600), 15)) {
		spawnFallingObject();
		spawnTimer = 0;
	}
	// Update and check falling notes
	for (var i = fallingNotes.length - 1; i >= 0; i--) {
		var note = fallingNotes[i];
		if (note.lastY === undefined) note.lastY = note.y;
		// Check if note went off screen
		if (note.lastY < 2732 && note.y >= 2732) {
			note.destroy();
			fallingNotes.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (note.lane === player.currentLane && note.intersects(player)) {
			LK.setScore(LK.getScore() + 10);
			scoreTxt.setText('Score: ' + LK.getScore());
			LK.getSound('catch').play();
			// Start music when first note is caught
			if (!musicStarted) {
				LK.playMusic('background_music');
				musicStarted = true;
			}
			note.destroy();
			fallingNotes.splice(i, 1);
			continue;
		}
		note.lastY = note.y;
	}
	// Update and check falling bombs
	for (var i = fallingBombs.length - 1; i >= 0; i--) {
		var bomb = fallingBombs[i];
		if (bomb.lastY === undefined) bomb.lastY = bomb.y;
		// Check if bomb went off screen
		if (bomb.lastY < 2732 && bomb.y >= 2732) {
			bomb.destroy();
			fallingBombs.splice(i, 1);
			continue;
		}
		// Check collision with player
		if (bomb.lane === player.currentLane && bomb.intersects(player)) {
			if (player.shieldActive) {
				// Bomb hits shield - create explosion effect
				LK.getSound('bomb_hit').play();
				LK.effects.flashScreen(0xFFD700, 300);
				// Create explosion effect using tween
				var explosionScale = {
					scale: 1
				};
				tween(explosionScale, {
					scale: 3
				}, {
					duration: 500,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						// Explosion animation complete
					}
				});
				// Tint bomb red and fade out for explosion effect
				tween(bomb, {
					alpha: 0,
					scaleX: 2,
					scaleY: 2
				}, {
					duration: 300,
					easing: tween.easeOut
				});
			} else {
				// Bomb hits player without shield
				playerHealth--;
				updateHeartsDisplay();
				LK.getSound('bomb_hit').play();
				LK.effects.flashScreen(0xff0000, 500);
			}
			bomb.destroy();
			fallingBombs.splice(i, 1);
			if (playerHealth <= 0) {
				// Make player bounce and fall when losing
				tween(player, {
					y: player.y - 200
				}, {
					duration: 400,
					easing: tween.easeOut,
					onFinish: function onFinish() {
						// After jumping up, fall down
						tween(player, {
							y: player.y + 400
						}, {
							duration: 600,
							easing: tween.bounceIn,
							onFinish: function onFinish() {
								LK.showGameOver();
							}
						});
					}
				});
			}
			continue;
		}
		bomb.lastY = bomb.y;
	}
	// Update and check shield powerups
	for (var i = shieldPowerups.length - 1; i >= 0; i--) {
		var shield = shieldPowerups[i];
		if (shield.lastY === undefined) shield.lastY = shield.y;
		// Check if shield went off screen
		if (shield.lastY < 2732 && shield.y >= 2732) {
			shield.destroy();
			shieldPowerups.splice(i, 1);
			shieldSpawned = false;
			continue;
		}
		// Check collision with player
		if (shield.lane === player.currentLane && shield.intersects(player) && !player.shieldActive) {
			player.activateShield();
			LK.getSound('shield_pickup').play();
			shield.destroy();
			shieldPowerups.splice(i, 1);
			shieldSpawned = false;
			continue;
		}
		shield.lastY = shield.y;
	}
	// Gradually increase game speed
	if (LK.ticks % 1800 === 0) {
		// Every 30 seconds
		gameSpeed += 0.1;
		for (var i = 0; i < fallingNotes.length; i++) {
			fallingNotes[i].speed = 8 * gameSpeed;
		}
		for (var i = 0; i < fallingBombs.length; i++) {
			fallingBombs[i].speed = 8 * gameSpeed;
		}
		for (var i = 0; i < shieldPowerups.length; i++) {
			shieldPowerups[i].speed = 6 * gameSpeed;
		}
	}
};

===================================================================
--- original.js
+++ change.js
@@ -237,9 +237,9 @@
 shieldUI.barFg.x = 0;
 shieldUI.barFg.y = 180;
 shieldUI.barFg.width = 300;
 shieldUI.barFg.height = 30;
-shieldUI.barFg.tint = 0xFFD700;
+shieldUI.barFg.tint = 0xFF0000;
 shieldUI.container.addChild(shieldUI.barFg);
 function updateHeartsDisplay() {
 	var heartsText = '';
 	for (var i = 0; i < playerHealth; i++) {