/**** 
* 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('arenaBorderBox', {
		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);
	var enemySprite = self.attachAsset('enemyBox', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// 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
				});
			}
		});
	};
	// --- Hover effect: vertical up/down movement ---
	self._hoverTweenUp = null;
	self._hoverTweenDown = null;
	self._hoverBaseY = self.y;
	function startHoverTween() {
		// Move up
		self._hoverTweenUp = tween(self, {
			y: self._hoverBaseY - 32
		}, {
			duration: 400,
			onFinish: function onFinish() {
				// Move down
				self._hoverTweenDown = tween(self, {
					y: self._hoverBaseY + 32
				}, {
					duration: 400,
					onFinish: function onFinish() {
						// Return to base and repeat
						self._hoverTweenReset = tween(self, {
							y: self._hoverBaseY
						}, {
							duration: 400,
							onFinish: function onFinish() {
								startHoverTween();
							}
						});
					}
				});
			}
		});
	}
	// Set initial y and start effect
	self.y = self._hoverBaseY;
	startHoverTween();
	return self;
});
// EnemyAsset: individual asset for enemy visual
var EnemyAsset = Container.expand(function () {
	var self = Container.call(this);
	// Main body
	var body = LK.getAsset('enemyBox', {
		width: 220,
		height: 120,
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.addChild(body);
	// Face/eyes (simple style)
	var eyeL = LK.getAsset('bullet', {
		width: 24,
		height: 24,
		color: 0xffffff,
		anchorX: 0.5,
		anchorY: 0.5
	});
	eyeL.x = -40;
	eyeL.y = -20;
	self.addChild(eyeL);
	var eyeR = LK.getAsset('bullet', {
		width: 24,
		height: 24,
		color: 0xffffff,
		anchorX: 0.5,
		anchorY: 0.5
	});
	eyeR.x = 40;
	eyeR.y = -20;
	self.addChild(eyeR);
	// Angry brow (simple rectangle)
	var browL = LK.getAsset('arenaBorderBox', {
		width: 32,
		height: 8,
		color: 0x222222,
		anchorX: 0.5,
		anchorY: 0.5
	});
	browL.x = -40;
	browL.y = -36;
	browL.rotation = -0.3;
	self.addChild(browL);
	var browR = LK.getAsset('arenaBorderBox', {
		width: 32,
		height: 8,
		color: 0x222222,
		anchorX: 0.5,
		anchorY: 0.5
	});
	browR.x = 40;
	browR.y = -36;
	browR.rotation = 0.3;
	self.addChild(browR);
	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)
// Unique assets for each visual element
// Arena border only
// Enemy only
// Player healthbar border
// Player healthbar bg
// Enemy healthbar border
// Enemy healthbar bg
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) just above the arena
var enemy = new Enemy();
enemy.x = 2048 / 2;
enemy.y = ARENA_Y - 80; // Place enemy just above the arena
game.addChild(enemy);
// 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;
// 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;
// Player healthbar (box style) under the arena
var playerHealthbarBg = LK.getAsset('playerHealthbarBg', {
	anchorX: 0.5,
	anchorY: 0.5
});
var playerHealthbarBox = LK.getAsset('playerHealthbarBox', {
	anchorX: 0,
	anchorY: 0.5
});
// Healthbar dimensions
var healthbarWidth = 900;
var healthbarHeight = 39.49;
var healthbarX = 2048 / 2 - healthbarWidth / 2;
var healthbarY = ARENA_Y + ARENA_H + 60; // 60px below arena
playerHealthbarBg.x = 2048 / 2;
playerHealthbarBg.y = healthbarY + healthbarHeight / 2;
playerHealthbarBox.x = healthbarX;
playerHealthbarBox.y = healthbarY + healthbarHeight / 2;
// Add HP label to the left of the healthbar
var hpLabelTxt = new Text2("HP", {
	size: 64,
	fill: "#fff"
});
hpLabelTxt.anchor.set(1, 0.5); // right align, vertically centered
// Place it 24px to the left of the healthbar
hpLabelTxt.x = healthbarX - 24;
hpLabelTxt.y = healthbarY + healthbarHeight / 2;
// Add to game
game.addChild(playerHealthbarBg);
game.addChild(playerHealthbarBox);
game.addChild(hpLabelTxt);
// Update function for healthbar
function updatePlayerHealthbar() {
	// Clamp HP
	var hp = Math.max(0, Math.min(soulHP, soulMaxHP));
	// Set width proportional to HP
	playerHealthbarBox.width = healthbarWidth * (hp / soulMaxHP);
}
updatePlayerHealthbar();
// 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;
		updatePlayerHealthbar();
		// 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);
				// Play sound on soul texture change (revive)
				LK.getSound('shoot').play();
			}
		}
	}
}
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;
			updatePlayerHealthbar();
			// 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);
						// Play sound on soul texture change (death)
						LK.getSound('shoot').play();
						// Blast into particles 1.35 sec after texture change
						LK.setTimeout(function () {
							// Remove soul sprite (if still present)
							if (soul.children && soul.children.length > 0) {
								soul.removeChild(soul.children[0]);
							}
							// Create 18 particles in a circle
							var numParticles = 18;
							var radius = 60;
							for (var i = 0; i < numParticles; ++i) {
								var angle = 2 * Math.PI * i / numParticles;
								var px = soul.x + Math.cos(angle) * 0;
								var py = soul.y + Math.sin(angle) * 0;
								var particle = new Bullet();
								particle.x = px;
								particle.y = py;
								// Give each particle a random color (yellow/orange/red)
								var colors = [0xffe066, 0xffb347, 0xff4444, 0xffe0a0, 0xffd700];
								var color = colors[Math.floor(Math.random() * colors.length)];
								if (particle.children && particle.children.length > 0) {
									particle.children[0].tint = color;
								}
								// Set velocity outward
								var speed = 13 + Math.random() * 4;
								particle.vx = Math.cos(angle) * speed;
								particle.vy = Math.sin(angle) * speed;
								// Fade out and destroy after 0.7s
								tween(particle, {
									alpha: 0
								}, {
									duration: 700,
									onFinish: function () {
										this.destroy();
									}.bind(particle)
								});
								game.addChild(particle);
							}
						}, 1350);
					}
				}, 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
@@ -204,12 +204,12 @@
 var arenaBorder = new ArenaBorder();
 arenaBorder.x = 2048 / 2;
 arenaBorder.y = 2732 / 2;
 game.addChild(arenaBorder);
-// Add enemy (boss) above the arena
+// Add enemy (boss) just above the arena
 var enemy = new Enemy();
 enemy.x = 2048 / 2;
-enemy.y = ARENA_Y + 60; // Move enemy further down into arena
+enemy.y = ARENA_Y - 80; // Place enemy just above the arena
 game.addChild(enemy);
 // Add soul (player)
 var soul = new Soul();
 soul.x = 2048 / 2;