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

/**** 
* Classes
****/ 
// Arena border (visual only)
var ArenaBorder = Container.expand(function () {
	var self = Container.call(this);
	var border = self.attachAsset('arenaBorder', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	border.alpha = 0.7;
	return self;
});
// Bullet class
var Bullet = Container.expand(function () {
	var self = Container.call(this);
	var bulletSprite = self.attachAsset('bullet', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.vx = 0;
	self.vy = 0;
	self.update = function () {
		self.x += self.vx;
		self.y += self.vy;
	};
	return self;
});
// Enemy (boss) class
var Enemy = Container.expand(function () {
	var self = Container.call(this);
	// Use arenaBorder as a placeholder, but you can swap to a unique asset if available
	var enemySprite = self.attachAsset('arenaBorder', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 220,
		height: 120,
		color: 0xff4444
	});
	// Health property
	self.maxHP = 20;
	self.hp = self.maxHP;
	// For hit flash
	self.flash = function () {
		tween(self, {
			alpha: 0.3
		}, {
			duration: 80,
			onFinish: function onFinish() {
				tween(self, {
					alpha: 1
				}, {
					duration: 120
				});
			}
		});
	};
	return self;
});
// Soul (player) class
var Soul = Container.expand(function () {
	var self = Container.call(this);
	var soulSprite = self.attachAsset('soul', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// For hit flash
	self.flash = function () {
		tween(self, {
			alpha: 0.3
		}, {
			duration: 80,
			onFinish: function onFinish() {
				tween(self, {
					alpha: 1
				}, {
					duration: 120
				});
			}
		});
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x181818
});

/**** 
* Game Code
****/ 
// Arena dimensions (centered)
// Heart-shaped soul (red)
// Arena border (white rectangle, thin)
// Bullet (white circle)
// Enemy warning (yellow, for telegraphing)
var ARENA_W = 1200;
var ARENA_H = 900;
var ARENA_X = 2048 / 2 - ARENA_W / 2;
var ARENA_Y = 2732 / 2 - ARENA_H / 2;
// Add arena border
var arenaBorder = new ArenaBorder();
arenaBorder.x = 2048 / 2;
arenaBorder.y = 2732 / 2;
game.addChild(arenaBorder);
// Add enemy (boss) above the arena
var enemy = new Enemy();
enemy.x = 2048 / 2;
enemy.y = ARENA_Y - 90; // 90px above arena top
game.addChild(enemy);
// Enemy healthbar GUI (styled box above arena)
var enemyHealthbarBg = new Container();
var enemyHealthbarFg = new Container();
var enemyHealthbarWidth = 400;
var enemyHealthbarHeight = 36;
var enemyHealthbarX = 2048 / 2 - enemyHealthbarWidth / 2;
var enemyHealthbarY = ARENA_Y - 80; // 80px above arena
// Enemy healthbar background (rounded box, dark gray)
var enemyHealthbarBgRect = LK.getAsset('arenaBorder', {
	width: enemyHealthbarWidth + 8,
	height: enemyHealthbarHeight + 8,
	color: 0x222222,
	anchorX: 0,
	anchorY: 0
});
enemyHealthbarBg.addChild(enemyHealthbarBgRect);
// Enemy healthbar border (white, slightly larger than fg)
var enemyHealthbarBorderRect = LK.getAsset('arenaBorder', {
	width: enemyHealthbarWidth + 4,
	height: enemyHealthbarHeight + 4,
	color: 0xffffff,
	anchorX: 0,
	anchorY: 0
});
enemyHealthbarBorderRect.x = 2;
enemyHealthbarBorderRect.y = 2;
enemyHealthbarBg.addChild(enemyHealthbarBorderRect);
// Enemy healthbar foreground (red, will be resized)
var enemyHealthbarFgRect = LK.getAsset('arenaBorder', {
	width: enemyHealthbarWidth,
	height: enemyHealthbarHeight,
	color: 0xff4444,
	anchorX: 0,
	anchorY: 0
});
enemyHealthbarFg.addChild(enemyHealthbarFgRect);
// Add to game (not GUI, so it stays above arena)
enemyHealthbarBg.x = enemyHealthbarX - 4;
enemyHealthbarBg.y = enemyHealthbarY - 4;
enemyHealthbarFg.x = enemyHealthbarX;
enemyHealthbarFg.y = enemyHealthbarY;
game.addChild(enemyHealthbarBg);
game.addChild(enemyHealthbarFg);
// Enemy healthbar label (left of bar)
var enemyHealthbarLabel = new Text2('ENEMY', {
	size: 48,
	fill: "#fff"
});
enemyHealthbarLabel.anchor.set(1, 0.5);
enemyHealthbarLabel.x = enemyHealthbarX - 24;
enemyHealthbarLabel.y = enemyHealthbarY + enemyHealthbarHeight / 2;
game.addChild(enemyHealthbarLabel);
// Enemy healthbar value text (right of bar)
var enemyHealthbarValue = new Text2('', {
	size: 48,
	fill: "#fff"
});
enemyHealthbarValue.anchor.set(0, 0.5);
enemyHealthbarValue.x = enemyHealthbarX + enemyHealthbarWidth + 24;
enemyHealthbarValue.y = enemyHealthbarY + enemyHealthbarHeight / 2;
game.addChild(enemyHealthbarValue);
// Enemy healthbar update function
function updateEnemyHealthbar() {
	// Clamp HP
	if (enemy.hp < 0) enemy.hp = 0;
	if (enemy.hp > enemy.maxHP) enemy.hp = enemy.maxHP;
	// Update width
	var ratio = enemy.hp / enemy.maxHP;
	if (enemyHealthbarFg.children && enemyHealthbarFg.children.length > 0 && enemyHealthbarFg.children[0]) {
		enemyHealthbarFg.children[0].width = Math.max(0, enemyHealthbarWidth * ratio);
	}
	// Update value text
	enemyHealthbarValue.setText(enemy.hp + "/" + enemy.maxHP);
}
updateEnemyHealthbar();
// Add soul (player)
var soul = new Soul();
soul.x = 2048 / 2;
soul.y = 2732 / 2;
game.addChild(soul);
// GUI: Timer (shows wave time left)
var timerTxt = new Text2('', {
	size: 80,
	fill: "#fff"
});
timerTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(timerTxt);
// GUI: Wave counter
var waveTxt = new Text2('', {
	size: 80,
	fill: "#fff"
});
waveTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(waveTxt);
waveTxt.y = 90;
// Healthbar GUI (styled box under arena)
var healthbarBg = new Container();
var healthbarFg = new Container();
var healthbarWidth = 400;
var healthbarHeight = 36;
// Position healthbar centered horizontally, below the arena
var healthbarX = 2048 / 2 - healthbarWidth / 2;
var healthbarY = ARENA_Y + ARENA_H + 48; // 48px below arena
// Healthbar background (rounded box, dark gray)
var healthbarBgRect = LK.getAsset('arenaBorder', {
	width: healthbarWidth + 8,
	height: healthbarHeight + 8,
	color: 0x222222,
	anchorX: 0,
	anchorY: 0
});
healthbarBg.addChild(healthbarBgRect);
// Healthbar border (white, slightly larger than fg)
var healthbarBorderRect = LK.getAsset('arenaBorder', {
	width: healthbarWidth + 4,
	height: healthbarHeight + 4,
	color: 0xffffff,
	anchorX: 0,
	anchorY: 0
});
healthbarBorderRect.x = 2;
healthbarBorderRect.y = 2;
healthbarBg.addChild(healthbarBorderRect);
// Healthbar foreground (green, will be resized)
var healthbarFgRect = LK.getAsset('arenaBorder', {
	width: healthbarWidth,
	height: healthbarHeight,
	color: 0x44ff44,
	anchorX: 0,
	anchorY: 0
});
healthbarFg.addChild(healthbarFgRect);
// Add to game (not GUI, so it stays under arena)
healthbarBg.x = healthbarX - 4;
healthbarBg.y = healthbarY - 4;
healthbarFg.x = healthbarX;
healthbarFg.y = healthbarY;
game.addChild(healthbarBg);
game.addChild(healthbarFg);
// Healthbar label (left of bar)
var healthbarLabel = new Text2('HP', {
	size: 48,
	fill: "#fff"
});
healthbarLabel.anchor.set(1, 0.5);
healthbarLabel.x = healthbarX - 24;
healthbarLabel.y = healthbarY + healthbarHeight / 2;
game.addChild(healthbarLabel);
// Healthbar value text (right of bar)
var healthbarValue = new Text2('', {
	size: 48,
	fill: "#fff"
});
healthbarValue.anchor.set(0, 0.5);
healthbarValue.x = healthbarX + healthbarWidth + 24;
healthbarValue.y = healthbarY + healthbarHeight / 2;
game.addChild(healthbarValue);
// Healthbar update function
function updateHealthbar() {
	// Clamp HP
	if (soulHP < 0) soulHP = 0;
	if (soulHP > soulMaxHP) soulHP = soulMaxHP;
	// Update width
	var ratio = soulHP / soulMaxHP;
	if (healthbarFg.children && healthbarFg.children.length > 0 && healthbarFg.children[0]) {
		healthbarFg.children[0].width = Math.max(0, healthbarWidth * ratio);
	}
	// Update value text
	healthbarValue.setText(soulHP + "/" + soulMaxHP);
}
updateHealthbar();
// Game state
var bullets = [];
var currentWave = 0;
var waveTime = 0;
var waveTimer = 0;
var waveActive = false;
var soulAlive = true;
var dragSoul = false;
var dragOffsetX = 0;
var dragOffsetY = 0;
// Soul health
var soulMaxHP = 5;
var soulHP = soulMaxHP;
// Healthbar GUI
// (removed duplicate healthbarBg, healthbarFg, healthbarWidth, healthbarHeight, healthbarX, healthbarY declarations)
// Arena bounds (for clamping soul)
function clampSoul(x, y) {
	var hw = 50,
		hh = 50; // soul half size
	var minX = ARENA_X + hw;
	var maxX = ARENA_X + ARENA_W - hw;
	var minY = ARENA_Y + hh;
	var maxY = ARENA_Y + ARENA_H - hh;
	return {
		x: Math.max(minX, Math.min(maxX, x)),
		y: Math.max(minY, Math.min(maxY, y))
	};
}
// Touch/drag controls
function handleSoulMove(x, y, obj) {
	if (!dragSoul || !soulAlive) return;
	var pos = clampSoul(x - dragOffsetX, y - dragOffsetY);
	soul.x = pos.x;
	soul.y = pos.y;
}
game.move = function (x, y, obj) {
	handleSoulMove(x, y, obj);
};
game.down = function (x, y, obj) {
	// Only start drag if inside soul
	var dx = x - soul.x,
		dy = y - soul.y;
	if (dx * dx + dy * dy <= 60 * 60) {
		dragSoul = true;
		dragOffsetX = x - soul.x;
		dragOffsetY = y - soul.y;
		handleSoulMove(x, y, obj);
	}
};
game.up = function (x, y, obj) {
	dragSoul = false;
};
// Waves definition
// Each wave: {duration, spawnFunc(tick, bulletsArr)}
var waves = [
// Wave 1: Simple slow bullets from top
{
	duration: 180,
	// 3s
	spawnFunc: function spawnFunc(tick, arr) {
		// Unpredictable horizontal movement for the whole line
		if (typeof spawnFunc._targetX === "undefined") {
			spawnFunc._targetX = 0;
			spawnFunc._currentX = 0;
			spawnFunc._tween = null;
			spawnFunc._lastTick = 0;
		}
		if (tick - spawnFunc._lastTick > 40 || Math.abs(spawnFunc._targetX - spawnFunc._currentX) < 5) {
			// Pick a new random target X offset within [-180, 180]
			var newTarget = (Math.random() * 2 - 1) * 180;
			spawnFunc._lastTick = tick;
			spawnFunc._targetX = newTarget;
			// Tween smoothly to new target over 30-60 frames
			if (spawnFunc._tween) spawnFunc._tween.stop();
			spawnFunc._tween = tween(spawnFunc, {
				_currentX: newTarget
			}, {
				duration: 30 + Math.floor(Math.random() * 30)
			});
		}
		var lineXOffset = spawnFunc._currentX;
		if (tick % 24 === 0) {
			// Wave 1: faster and more bullets, with unpredictable horizontal movement
			var speed = 8;
			for (var i = 0; i < 6; ++i) {
				var b = new Bullet();
				b.x = ARENA_X + 120 + i * 180 + lineXOffset;
				b.y = ARENA_Y + 30;
				b.vx = 0;
				b.vy = speed;
				arr.push(b);
				game.addChild(b);
			}
		}
	}
},
// Wave 2: Bullets from left/right
{
	duration: 210,
	// 3.5s
	spawnFunc: function spawnFunc(tick, arr) {
		// Make the whole line go up and down using a vertical offset
		var lineOscAmp = 120; // amplitude of up/down movement
		var lineOscFreq = 0.025; // frequency of up/down movement
		var lineYOffset = Math.sin(tick * lineOscFreq) * lineOscAmp;
		// Center the bullet lines vertically in the arena, closer to the middle
		var centerY1 = ARENA_Y + ARENA_H / 2 - 120;
		var centerY2 = ARENA_Y + ARENA_H / 2 + 120;
		if (tick % 24 === 0) {
			// S-shape: bullets from left and right, with vy oscillating as a sine wave
			var speed = 10;
			var amplitude = 60; // increased vertical amplitude of S
			var freq = 0.012; // lowered frequency of S even more (even slower oscillation)
			// Left to right
			var b1 = new Bullet();
			b1.x = ARENA_X + 30;
			b1.y = (tick % 2 === 0 ? centerY1 : centerY2) + lineYOffset;
			b1.vx = speed;
			b1.vy = amplitude * Math.sin((tick + 0) * freq);
			// Store phase for S motion
			b1._sPhase = (tick + 0) * freq;
			b1._sDir = 1;
			// Override update for S shape
			b1._baseY = b1.y;
			b1._baseX = b1.x;
			b1._t = 0;
			b1._lineOscAmp = lineOscAmp;
			b1._lineOscFreq = lineOscFreq;
			b1._spawnTick = tick;
			b1.update = function () {
				this.x += this.vx;
				this._t += 1;
				// S shape: y = baseY + amplitude * sin((x - baseX) * freq) + line oscillation
				var lineYOffset = Math.sin((this._spawnTick + this._t) * this._lineOscFreq) * this._lineOscAmp;
				this.y = this._baseY + amplitude * Math.sin((this.x - this._baseX) * freq) + (lineYOffset - Math.sin(this._spawnTick * this._lineOscFreq) * this._lineOscAmp);
			};
			arr.push(b1);
			game.addChild(b1);
			// Right to left
			var b2 = new Bullet();
			b2.x = ARENA_X + ARENA_W - 30;
			b2.y = (tick % 2 === 0 ? centerY2 : centerY1) + lineYOffset;
			b2.vx = -speed;
			b2.vy = amplitude * Math.sin((tick + 60) * freq);
			b2._sPhase = (tick + 60) * freq;
			b2._sDir = -1;
			b2._baseY = b2.y;
			b2._baseX = b2.x;
			b2._t = 0;
			b2._lineOscAmp = lineOscAmp;
			b2._lineOscFreq = lineOscFreq;
			b2._spawnTick = tick;
			b2.update = function () {
				this.x += this.vx;
				this._t += 1;
				var lineYOffset = Math.sin((this._spawnTick + this._t) * this._lineOscFreq) * this._lineOscAmp;
				this.y = this._baseY + amplitude * Math.sin((this.x - this._baseX) * freq) + (lineYOffset - Math.sin(this._spawnTick * this._lineOscFreq) * this._lineOscAmp);
			};
			arr.push(b2);
			game.addChild(b2);
		}
	}
},
// Wave 3: Diagonal bullets from corners
{
	duration: 240,
	// 4s
	spawnFunc: function spawnFunc(tick, arr) {
		if (tick % 36 === 0) {
			// Wave 3: diagonal, medium speed
			var speed = 7.5;
			var diag = speed / Math.sqrt(2);
			// Top-left
			var b1 = new Bullet();
			b1.x = ARENA_X + 40;
			b1.y = ARENA_Y + 40;
			b1.vx = diag;
			b1.vy = diag;
			arr.push(b1);
			game.addChild(b1);
			// Top-right
			var b2 = new Bullet();
			b2.x = ARENA_X + ARENA_W - 40;
			b2.y = ARENA_Y + 40;
			b2.vx = -diag;
			b2.vy = diag;
			arr.push(b2);
			game.addChild(b2);
			// Bottom-left
			var b3 = new Bullet();
			b3.x = ARENA_X + 40;
			b3.y = ARENA_Y + ARENA_H - 40;
			b3.vx = diag;
			b3.vy = -diag;
			arr.push(b3);
			game.addChild(b3);
			// Bottom-right
			var b4 = new Bullet();
			b4.x = ARENA_X + ARENA_W - 40;
			b4.y = ARENA_Y + ARENA_H - 40;
			b4.vx = -diag;
			b4.vy = -diag;
			arr.push(b4);
			game.addChild(b4);
		}
	}
},
// Wave 4: Random rain
{
	duration: 210,
	// 3.5s
	spawnFunc: function spawnFunc(tick, arr) {
		if (tick % 10 === 0) {
			// Wave 4: fast random rain
			var minSpeed = 12,
				maxSpeed = 16;
			var b = new Bullet();
			b.x = ARENA_X + 80 + Math.floor(Math.random() * (ARENA_W - 160));
			b.y = ARENA_Y + 30;
			b.vx = 0;
			b.vy = minSpeed + Math.random() * (maxSpeed - minSpeed);
			arr.push(b);
			game.addChild(b);
		}
	}
},
// Wave 5: Spiral (center out)
{
	duration: 270,
	// 4.5s
	spawnFunc: function spawnFunc(tick, arr) {
		if (tick % 12 === 0) {
			// Wave 5: spiral, moderate speed
			var speed = 9;
			var angle = tick / 12 * 0.5;
			for (var i = 0; i < 4; ++i) {
				var a = angle + i * Math.PI / 2;
				var b = new Bullet();
				b.x = 2048 / 2;
				b.y = 2732 / 2;
				b.vx = Math.cos(a) * speed;
				b.vy = Math.sin(a) * speed;
				arr.push(b);
				game.addChild(b);
			}
		}
	}
}];
// Start first wave
function startWave(idx) {
	currentWave = idx;
	waveTime = 0;
	waveActive = true;
	waveTimer = 0;
	// Remove all bullets
	for (var i = bullets.length - 1; i >= 0; --i) {
		bullets[i].destroy();
		bullets.splice(i, 1);
	}
	// Update GUI
	waveTxt.setText("Wave " + (currentWave + 1) + "/" + waves.length);
	// Reset HP and healthbar if starting first wave (new game)
	if (currentWave === 0) {
		soulHP = soulMaxHP;
		soulAlive = true;
		updateHealthbar();
		// Restore soul sprite if needed
		if (soul.children && soul.children.length > 0) {
			var firstChild = soul.children[0];
			if (firstChild.assetId === 'warning') {
				soul.removeChild(firstChild);
				var newSoulSprite = LK.getAsset('soul', {
					anchorX: 0.5,
					anchorY: 0.5
				});
				soul.addChildAt(newSoulSprite, 0);
			}
		}
	}
}
startWave(0);
// Main update loop
game.update = function () {
	if (!soulAlive) return;
	// Wave logic
	if (waveActive) {
		var wave = waves[currentWave];
		wave.spawnFunc(waveTime, bullets);
		waveTime++;
		// Update timer GUI
		var tleft = Math.max(0, Math.ceil((wave.duration - waveTime) / 60));
		timerTxt.setText("Time: " + tleft + "s");
		// End wave?
		if (waveTime >= wave.duration) {
			waveActive = false;
			// Remove all bullets after short delay
			LK.setTimeout(function () {
				for (var i = bullets.length - 1; i >= 0; --i) {
					bullets[i].destroy();
					bullets.splice(i, 1);
				}
				// Next wave or win
				if (currentWave + 1 < waves.length) {
					startWave(currentWave + 1);
				} else {
					// Win!
					LK.showYouWin();
				}
			}, 600);
		}
	}
	// Update bullets
	for (var i = bullets.length - 1; i >= 0; --i) {
		var b = bullets[i];
		b.update();
		// Remove if out of arena (immediately on leaving the border)
		if (b.x < ARENA_X || b.x > ARENA_X + ARENA_W || b.y < ARENA_Y || b.y > ARENA_Y + ARENA_H) {
			b.destroy();
			bullets.splice(i, 1);
			continue;
		}
		// Collision with soul
		var dx = b.x - soul.x,
			dy = b.y - soul.y;
		if (dx * dx + dy * dy < 45 * 45) {
			// Hit!
			soul.flash();
			soulHP -= 1;
			updateHealthbar();
			// Remove bullet on hit
			b.destroy();
			bullets.splice(i, 1);
			if (soulHP <= 0 && soulAlive) {
				soulAlive = false;
				// Delay soul's texture asset change to 2 seconds after dying
				LK.setTimeout(function () {
					if (soul.children && soul.children.length > 0) {
						var deadSprite = LK.getAsset('warning', {
							anchorX: 0.5,
							anchorY: 0.5
						});
						var oldSprite = soul.children[0];
						deadSprite.x = oldSprite.x;
						deadSprite.y = oldSprite.y;
						soul.removeChild(oldSprite);
						soul.addChildAt(deadSprite, 0);
					}
				}, 2000);
				LK.effects.flashScreen(0xff0000, 800);
				LK.setTimeout(function () {
					LK.showGameOver();
				}, 5000);
				break;
			} else {
				// Flash screen for hit, but not game over
				LK.effects.flashScreen(0xff0000, 300);
			}
		}
	}
};
// Initial GUI text
timerTxt.setText("Time: ");
waveTxt.setText("Wave 1/" + waves.length);

===================================================================
--- original.js
+++ change.js
@@ -30,8 +30,39 @@
 		self.y += self.vy;
 	};
 	return self;
 });
+// Enemy (boss) class
+var Enemy = Container.expand(function () {
+	var self = Container.call(this);
+	// Use arenaBorder as a placeholder, but you can swap to a unique asset if available
+	var enemySprite = self.attachAsset('arenaBorder', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		width: 220,
+		height: 120,
+		color: 0xff4444
+	});
+	// Health property
+	self.maxHP = 20;
+	self.hp = self.maxHP;
+	// For hit flash
+	self.flash = function () {
+		tween(self, {
+			alpha: 0.3
+		}, {
+			duration: 80,
+			onFinish: function onFinish() {
+				tween(self, {
+					alpha: 1
+				}, {
+					duration: 120
+				});
+			}
+		});
+	};
+	return self;
+});
 // Soul (player) class
 var Soul = Container.expand(function () {
 	var self = Container.call(this);
 	var soulSprite = self.attachAsset('soul', {
@@ -79,8 +110,88 @@
 var arenaBorder = new ArenaBorder();
 arenaBorder.x = 2048 / 2;
 arenaBorder.y = 2732 / 2;
 game.addChild(arenaBorder);
+// Add enemy (boss) above the arena
+var enemy = new Enemy();
+enemy.x = 2048 / 2;
+enemy.y = ARENA_Y - 90; // 90px above arena top
+game.addChild(enemy);
+// Enemy healthbar GUI (styled box above arena)
+var enemyHealthbarBg = new Container();
+var enemyHealthbarFg = new Container();
+var enemyHealthbarWidth = 400;
+var enemyHealthbarHeight = 36;
+var enemyHealthbarX = 2048 / 2 - enemyHealthbarWidth / 2;
+var enemyHealthbarY = ARENA_Y - 80; // 80px above arena
+// Enemy healthbar background (rounded box, dark gray)
+var enemyHealthbarBgRect = LK.getAsset('arenaBorder', {
+	width: enemyHealthbarWidth + 8,
+	height: enemyHealthbarHeight + 8,
+	color: 0x222222,
+	anchorX: 0,
+	anchorY: 0
+});
+enemyHealthbarBg.addChild(enemyHealthbarBgRect);
+// Enemy healthbar border (white, slightly larger than fg)
+var enemyHealthbarBorderRect = LK.getAsset('arenaBorder', {
+	width: enemyHealthbarWidth + 4,
+	height: enemyHealthbarHeight + 4,
+	color: 0xffffff,
+	anchorX: 0,
+	anchorY: 0
+});
+enemyHealthbarBorderRect.x = 2;
+enemyHealthbarBorderRect.y = 2;
+enemyHealthbarBg.addChild(enemyHealthbarBorderRect);
+// Enemy healthbar foreground (red, will be resized)
+var enemyHealthbarFgRect = LK.getAsset('arenaBorder', {
+	width: enemyHealthbarWidth,
+	height: enemyHealthbarHeight,
+	color: 0xff4444,
+	anchorX: 0,
+	anchorY: 0
+});
+enemyHealthbarFg.addChild(enemyHealthbarFgRect);
+// Add to game (not GUI, so it stays above arena)
+enemyHealthbarBg.x = enemyHealthbarX - 4;
+enemyHealthbarBg.y = enemyHealthbarY - 4;
+enemyHealthbarFg.x = enemyHealthbarX;
+enemyHealthbarFg.y = enemyHealthbarY;
+game.addChild(enemyHealthbarBg);
+game.addChild(enemyHealthbarFg);
+// Enemy healthbar label (left of bar)
+var enemyHealthbarLabel = new Text2('ENEMY', {
+	size: 48,
+	fill: "#fff"
+});
+enemyHealthbarLabel.anchor.set(1, 0.5);
+enemyHealthbarLabel.x = enemyHealthbarX - 24;
+enemyHealthbarLabel.y = enemyHealthbarY + enemyHealthbarHeight / 2;
+game.addChild(enemyHealthbarLabel);
+// Enemy healthbar value text (right of bar)
+var enemyHealthbarValue = new Text2('', {
+	size: 48,
+	fill: "#fff"
+});
+enemyHealthbarValue.anchor.set(0, 0.5);
+enemyHealthbarValue.x = enemyHealthbarX + enemyHealthbarWidth + 24;
+enemyHealthbarValue.y = enemyHealthbarY + enemyHealthbarHeight / 2;
+game.addChild(enemyHealthbarValue);
+// Enemy healthbar update function
+function updateEnemyHealthbar() {
+	// Clamp HP
+	if (enemy.hp < 0) enemy.hp = 0;
+	if (enemy.hp > enemy.maxHP) enemy.hp = enemy.maxHP;
+	// Update width
+	var ratio = enemy.hp / enemy.maxHP;
+	if (enemyHealthbarFg.children && enemyHealthbarFg.children.length > 0 && enemyHealthbarFg.children[0]) {
+		enemyHealthbarFg.children[0].width = Math.max(0, enemyHealthbarWidth * ratio);
+	}
+	// Update value text
+	enemyHealthbarValue.setText(enemy.hp + "/" + enemy.maxHP);
+}
+updateEnemyHealthbar();
 // Add soul (player)
 var soul = new Soul();
 soul.x = 2048 / 2;
 soul.y = 2732 / 2;