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

/**** 
* Classes
****/ 
// Backpack class (for weapon upgrades)
var Backpack = Container.expand(function () {
	var self = Container.call(this);
	// Determine color and shape by type after instantiation
	self.type = 0; // 1=laser, 2=plasma, 3=bazooka
	self.collected = false;
	self._bag = null;
	function updateBagVisual() {
		// Remove old bag if exists
		if (self._bag) {
			self.removeChild(self._bag);
			self._bag = null;
		}
		var color = 0x888888;
		if (self.type === 1) color = 0xff0000; // Laser: red
		else if (self.type === 2) color = 0xff9800; // Plasma: orange
		else if (self.type === 3) color = 0x9c27b0; // Bazooka: purple
		self._bag = self.attachAsset('coin', {
			anchorX: 0.5,
			anchorY: 0.5,
			width: 90,
			height: 90,
			color: color,
			shape: 'box'
		});
	}
	updateBagVisual();
	self.update = function () {
		// Bobbing animation
		self.y += Math.sin(LK.ticks / 10 + self.x) * 0.7;
	};
	self.collect = function () {
		if (self.collected) return;
		self.collected = true;
		tween(self, {
			alpha: 0,
			y: self.y - 60
		}, {
			duration: 300,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	return self;
});
// Bazooka projectile (green, can destroy two giants)
var Bazooka = Container.expand(function () {
	var self = Container.call(this);
	var bazooka = self.attachAsset('slingStone', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 60,
		height: 60,
		color: 0x00ff00
	});
	self.vx = 0;
	self.vy = -28;
	self.active = true;
	self.damage = 2; // Bazooka deals 2 damage (kills a giant in 1 hit)
	self.pierce = 2; // can hit two targets
	self.update = function () {
		if (!self.active) return;
		self.x += self.vx;
		self.y += self.vy;
	};
	return self;
});
// Boss Bomb projectile (thrown by boss)
var BossBomb = Container.expand(function () {
	var self = Container.call(this);
	var bomb = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 60,
		height: 60,
		color: 0x333333,
		shape: 'ellipse'
	});
	self.vx = 0;
	self.vy = 0;
	self.hit = false;
	self._exploded = false;
	self.update = function () {
		if (self._exploded) return;
		self.x += self.vx;
		self.y += self.vy;
		self.vy += 1.2; // gravity
		// Simple spin
		bomb.rotation += 0.2;
	};
	self.explode = function () {
		if (self._exploded) return;
		self._exploded = true;
		tween(self, {
			scaleX: 2,
			scaleY: 2,
			alpha: 0
		}, {
			duration: 300,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
		// Optional: play explosion sound here
	};
	return self;
});
// Boss Giant
var BossGiant = Container.expand(function () {
	var self = Container.call(this);
	var body = self.attachAsset('bossBody', {
		anchorX: 0.5,
		anchorY: 1
	});
	var head = self.attachAsset('bossHead', {
		anchorX: 0.5,
		anchorY: 1,
		y: -body.height
	});
	self.hp = 15;
	self.speed = 2.2;
	self.active = true;
	self.update = function () {
		if (!self.active) return;
		// Move toward David (slightly faster than before)
		if (david && david.y < self.y) {
			// Move down (with world scrolling up)
			self.y += self.speed + 1.2;
			// Track David horizontally
			if (Math.abs(self.x - david.x) > 10) {
				if (self.x < david.x) self.x += 2.5;else self.x -= 2.5;
			}
		} else {
			self.y += self.speed + 1.2;
		}
		// Keep boss inside sky image area
		if (self.x < 150) self.x = 150;
		if (self.x > 2048 - 150) self.x = 2048 - 150;
		if (self.y < 200) self.y = 200;
		if (self.y > 1800) self.y = 1800;
		// --- Boss Stick (right hand) ---
		// Add stick if not present
		if (!self._stick) {
			self._stick = self.attachAsset('davidArm', {
				anchorX: 0.5,
				anchorY: 0.1,
				width: 30,
				height: 180,
				color: 0x8d5524,
				x: self.width / 2 + 80,
				y: -self.height + 120
			});
			self._stickSwingAngle = 0;
			self._stickSwingDown = true;
			self._stickBaseX = self._stick.x;
			self._stickBaseY = self._stick.y;
		}
		// Animate stick swinging downward to hit David
		if (typeof self._stickSwingAngle !== "number") self._stickSwingAngle = 0;
		if (typeof self._stickSwingDown !== "boolean") self._stickSwingDown = true;
		if (self._stickSwingDown) {
			self._stickSwingAngle += 0.10 + Math.random() * 0.03;
			if (self._stickSwingAngle > 1.2) self._stickSwingDown = false;
		} else {
			self._stickSwingAngle -= 0.08 + Math.random() * 0.02;
			if (self._stickSwingAngle < -0.3) self._stickSwingDown = true;
		}
		self._stick.rotation = self._stickSwingAngle + 1.1;
		// Keep stick attached to boss's right side
		self._stick.x = self.width / 2 + 80;
		self._stick.y = -self.height + 120;
		// --- End Boss Stick ---
		// Axe swing animation (right arm)
		if (!self._axe) {
			self._axe = self.attachAsset('davidArm', {
				anchorX: 0.5,
				anchorY: 0.1,
				x: self.width / 2 + 60,
				y: -self.height + 80,
				color: 0x444444
			});
		}
		if (!self._axeAngle) self._axeAngle = 0;
		self._axeAngle += 0.13 + Math.random() * 0.04;
		self._axe.rotation = Math.sin(self._axeAngle) * 1.2 + 1.2;
		// Boss health bar (tube) above boss
		if (!self._hpBarBg) {
			self._hpBarBg = self.attachAsset('coin', {
				anchorX: 0.5,
				anchorY: 0.5,
				width: 220,
				height: 32,
				color: 0x222222,
				shape: 'box',
				y: -self.height - 60
			});
		}
		if (!self._hpBar) {
			self._hpBar = self.attachAsset('coin', {
				anchorX: 0,
				anchorY: 0.5,
				width: 210,
				height: 20,
				color: 0x43a047,
				shape: 'box',
				x: -105,
				y: -self.height - 60
			});
		}
		if (self._hpBar) {
			var maxHp = self.maxHp || (self.hp > 0 ? self.hp : 1);
			if (!self.maxHp) self.maxHp = self.hp;
			var frac = Math.max(0, Math.min(1, self.hp / self.maxHp));
			self._hpBar.width = 210 * frac;
			// Color: green to red
			var col = 0x43a047;
			if (frac < 0.5) col = 0xffa000;
			if (frac < 0.25) col = 0xd32f2f;
			self._hpBar.tint = col;
		}
	};
	self.takeDamage = function (dmg) {
		self.hp -= dmg;
		if (self.hp <= 0) {
			self.active = false;
			LK.getSound('giantVanish').play();
			tween(self, {
				alpha: 0
			}, {
				duration: 600,
				onFinish: function onFinish() {
					// Remove health bar assets if present
					if (self._hpBarBg) {
						self.removeChild(self._hpBarBg);
						self._hpBarBg = null;
					}
					if (self._hpBar) {
						self.removeChild(self._hpBar);
						self._hpBar = null;
					}
					self.destroy();
				}
			});
		} else {
			LK.getSound('hit').play();
			tween(self, {
				tint: 0xff7043
			}, {
				duration: 180,
				onFinish: function onFinish() {
					tween(self, {
						tint: 0xffffff
					}, {
						duration: 180
					});
				}
			});
		}
	};
	return self;
});
// Boss Whip hitbox (short-lived, for boss whip attack)
var BossWhip = Container.expand(function () {
	var self = Container.call(this);
	var whip = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 180,
		height: 40,
		color: 0x8d5524,
		shape: 'box'
	});
	self._life = 0;
	self.hit = false;
	return self;
});
// Chicken class
var Chicken = Container.expand(function () {
	var self = Container.call(this);
	var chicken = self.attachAsset('chicken', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.collected = false;
	self.animTimer = 0;
	self.update = function () {
		// Simple idle animation (bobbing)
		self.animTimer++;
		self.y += Math.sin(self.animTimer / 10) * 1.2;
	};
	self.collect = function () {
		if (self.collected) return;
		self.collected = true;
		tween(self, {
			alpha: 0,
			y: self.y - 60
		}, {
			duration: 300,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	return self;
});
// Coin class
var Coin = Container.expand(function () {
	var self = Container.call(this);
	var coin = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.collected = false;
	self.animTimer = 0;
	self.update = function () {
		// Simple spin animation
		self.animTimer++;
		coin.rotation += 0.15;
		self.y += Math.sin(self.animTimer / 12) * 0.8;
	};
	self.collect = function () {
		if (self.collected) return;
		self.collected = true;
		tween(self, {
			alpha: 0,
			y: self.y - 40
		}, {
			duration: 200,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	return self;
});
// Spawn chickens and coins for the current wave
// David (player)
var David = Container.expand(function () {
	var self = Container.call(this);
	var body = self.attachAsset('davidBody', {
		anchorX: 0.5,
		anchorY: 1
	});
	// Arm removed (no davidArm asset)
	self.arm = {
		width: 100,
		height: 100
	}; // dummy object to prevent errors
	self.armAngle = 0;
	self.armSpeed = 0.18; // radians per frame
	self.armRadius = 70;
	self.slingReady = true;
	self.stoneCooldown = 0;
	self.hp = 5;
	self.maxHp = 5;
	self.regenTimer = 0;
	self.update = function () {
		// Spin arm
		self.armAngle += self.armSpeed;
		if (self.armAngle > Math.PI * 2) self.armAngle -= Math.PI * 2;
		// Arm rotates in a circle
		self.arm.rotation = self.armAngle;
		// Stone cooldown
		if (self.stoneCooldown > 0) self.stoneCooldown--;
		// Health regen
		if (self.hp < self.maxHp) {
			self.regenTimer++;
			if (self.regenTimer > 180) {
				// 3 seconds
				self.hp++;
				self.regenTimer = 0;
			}
		} else {
			self.regenTimer = 0;
		}
	};
	self.throwStone = function () {
		if (!self.slingReady || self.stoneCooldown > 0) return null;
		self.slingReady = false;
		self.stoneCooldown = 5; // fast fire rate for machine gun
		LK.getSound('throw').play();
		// Calculate projectile start position (end of arm)
		var angle = self.armAngle;
		var sx = self.x + Math.cos(angle) * (body.width / 2 + self.arm.height * 0.9);
		var sy = self.y - body.height + 40 + Math.sin(angle) * (self.arm.height * 0.9);
		// Always fire a machine gun bullet straight upwards
		var proj = new Stone();
		proj.x = sx;
		proj.y = sy;
		proj.vx = 0;
		proj.vy = -38; // faster than stone for machine gun
		return proj;
	};
	self.takeDamage = function (dmg) {
		self.hp -= dmg;
		if (self.hp < 0) self.hp = 0;
		LK.effects.flashObject(self, 0xff0000, 400);
		// No weapon revert on damage in machine gun only mode
	};
	return self;
});
// Giant enemy
var Giant = Container.expand(function () {
	var self = Container.call(this);
	var body = self.attachAsset('giantBody', {
		anchorX: 0.5,
		anchorY: 1
	});
	var head = self.attachAsset('giantHead', {
		anchorX: 0.5,
		anchorY: 1,
		y: -body.height
	});
	self.hp = 2; // Each giant requires 2 hits to die
	self.speed = 3 + Math.random() * 2;
	self.active = true;
	self.update = function () {
		if (!self.active) return;
		// Giants move downward (with world scrolling up, so add speed to y)
		self.y += self.speed;
	};
	self.takeDamage = function (dmg) {
		self.hp -= dmg;
		if (self.hp <= 0) {
			self.active = false;
			LK.getSound('giantVanish').play();
			tween(self, {
				alpha: 0
			}, {
				duration: 300,
				onFinish: function onFinish() {
					self.destroy();
				}
			});
		} else {
			LK.getSound('hit').play();
			tween(self, {
				tint: 0xffe082
			}, {
				duration: 120,
				onFinish: function onFinish() {
					tween(self, {
						tint: 0xffffff
					}, {
						duration: 120
					});
				}
			});
		}
	};
	return self;
});
// Heart class (for health pickup)
var Heart = Container.expand(function () {
	var self = Container.call(this);
	var heart = self.attachAsset('coin', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 90,
		height: 90,
		color: 0xff69b4,
		// pink
		shape: 'box'
	});
	self.collected = false;
	self.update = function () {
		self.y += Math.sin(LK.ticks / 12 + self.x) * 0.8;
	};
	self.collect = function () {
		if (self.collected) return;
		self.collected = true;
		tween(self, {
			alpha: 0,
			y: self.y - 60
		}, {
			duration: 300,
			onFinish: function onFinish() {
				self.destroy();
			}
		});
	};
	return self;
});
// Laser projectile (covers whole screen, instant)
var Laser = Container.expand(function () {
	var self = Container.call(this);
	var laser = self.attachAsset('slingStone', {
		anchorX: 0.5,
		anchorY: 1,
		width: 30,
		height: 400,
		// Match catapult (stone) range
		color: 0x9c27b0 // purple
	});
	self.active = true;
	self.damage = 1; // Laser deals 1 damage to giants, so 2 hits are required
	self.update = function () {
		// Laser is instant, doesn't move, but can fade out
		if (!self.active) return;
		// Fade out after a few frames
		if (!self._life) self._life = 0;
		self._life++;
		if (self._life > 10) {
			self.active = false;
			self.destroy();
		}
	};
	return self;
});
// Plasma projectile (fast, yellow, destroys instantly)
var Plasma = Container.expand(function () {
	var self = Container.call(this);
	var plasma = self.attachAsset('slingStone', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 44,
		height: 44,
		color: 0xffe600
	});
	self.vx = 0;
	self.vy = -40;
	self.active = true;
	self.damage = 99; // always kills (plasma is instant kill)
	self.update = function () {
		if (!self.active) return;
		self.x += self.vx;
		self.y += self.vy;
	};
	return self;
});
// Stone projectile
var Stone = Container.expand(function () {
	var self = Container.call(this);
	var stone = self.attachAsset('slingStone', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.vx = 0;
	self.vy = 0;
	self.active = true;
	self.damage = 1; // Stone deals 1 damage to giants
	self.update = function () {
		if (!self.active) return;
		self.x += self.vx;
		self.y += self.vy;
		// Gravity
		self.vy += 0.7;
	};
	return self;
});

/**** 
* Initialize Game
****/ 
var game = new LK.Game({
	backgroundColor: 0x87ceeb
});

/**** 
* Game Code
****/ 
// Character (David)
// --- ENVIRONMENT ---
var sky = LK.getAsset('sky', {
	x: 0,
	y: 0
});
game.addChild(sky);
// Ensure sky is always at the bottom of the display list and never removed
if (typeof game._skyLock === "undefined") {
	game._skyLock = true;
	var originalRemoveChild = game.removeChild;
	game.removeChild = function (child) {
		if (child === sky) {
			// Prevent sky from being removed
			return;
		}
		return originalRemoveChild.call(this, child);
	};
	// Always keep sky at the bottom
	var originalAddChild = game.addChild;
	game.addChild = function (child) {
		if (child === sky) {
			// Only add sky if not already present
			if (this.children && this.children[0] !== sky) {
				originalAddChild.call(this, child);
				// Move sky to index 0
				if (this.children && this.children.length > 1) {
					this.children.splice(this.children.indexOf(sky), 1);
					this.children.unshift(sky);
				}
			}
			return sky;
		}
		var result = originalAddChild.call(this, child);
		// After adding any child, ensure sky is at index 0
		if (this.children && this.children[0] !== sky && this.children.indexOf(sky) !== -1) {
			this.children.splice(this.children.indexOf(sky), 1);
			this.children.unshift(sky);
		}
		return result;
	};
}
var ground = LK.getAsset('ground', {
	x: 0,
	y: 2532
});
ground.y = 2532; // bottom of screen
game.addChild(ground);
// --- PLAYER ---
var david = new David();
david.x = 1024; // center horizontally
david.y = 2300; // near bottom, above ground
game.addChild(david);
// --- WEAPON SYSTEM ---
// Machine Gun is the only weapon
var WEAPON_MACHINEGUN = 0;
var weaponNames = ["Machine Gun"];
var weaponColors = [0x888888];
// Start with Machine Gun only
var weapon = WEAPON_MACHINEGUN;
var weaponUnlocked = [true]; // Only Machine Gun unlocked
var weaponLast = WEAPON_MACHINEGUN;
var weaponTimeouts = [0];
// Weapon UI
var weaponTxt = new Text2('Machine Gun', {
	size: 80,
	fill: "#fff"
});
weaponTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(weaponTxt);
weaponTxt.y = 220;
// --- BACKPACKS & HEART ---
var backpacks = [];
var heart = null;
var heartCollected = false;
// --- SCROLLING STATE ---
var scrollY = 0; // how much the world has scrolled up
var scrollSpeed = 4; // px per frame, adjust for desired speed
// --- UI ---
var score = 0;
var scoreTxt = new Text2('0', {
	size: 120,
	fill: "#fff"
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var hpTxt = new Text2('♥♥♥♥♥', {
	size: 90,
	fill: 0xE53935
});
hpTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(hpTxt);
hpTxt.y = 120;
// --- LEADERBOARD ---
// Leaderboard UI and logic removed as per new requirements
// --- GAME STATE ---
var stones = [];
var giants = [];
var boss = null;
var chickens = [];
var coins = [];
var wave = 1;
var giantsToSpawn = 5;
var giantsSpawned = 0;
var spawnTimer = 0;
var gameActive = true;
var bossActive = false;
var bossDefeated = false;
// --- CHAPTER STATE ---
var chapter = 1;
var bossScale = 1;
// Chicken and coin spawn positions per level (max 5 coins per level)
var chickenSpawns = [
// For each wave, array of {x, y}
[{
	x: 600,
	y: 1800
}, {
	x: 1500,
	y: 800
}], [{
	x: 400,
	y: 1200
}, {
	x: 1700,
	y: 600
}, {
	x: 1200,
	y: 2000
}], [{
	x: 900,
	y: 900
}, {
	x: 1800,
	y: 400
}, {
	x: 300,
	y: 2200
}]];
var coinSpawns = [[{
	x: 400,
	y: 400
}, {
	x: 800,
	y: 600
}, {
	x: 1200,
	y: 800
}, {
	x: 1600,
	y: 1000
}, {
	x: 200,
	y: 2000
}], [{
	x: 600,
	y: 500
}, {
	x: 1000,
	y: 700
}, {
	x: 1400,
	y: 900
}, {
	x: 1800,
	y: 1100
}, {
	x: 400,
	y: 2100
}], [{
	x: 800,
	y: 300
}, {
	x: 1200,
	y: 500
}, {
	x: 1600,
	y: 700
}, {
	x: 200,
	y: 900
}, {
	x: 1800,
	y: 2300
}]];
// Spawn chickens and coins for the current wave
function spawnCollectiblesForWave(waveIdx) {
	// Remove old
	for (var i = chickens.length - 1; i >= 0; i--) {
		chickens[i].destroy();
		chickens.splice(i, 1);
	}
	for (var i = coins.length - 1; i >= 0; i--) {
		coins[i].destroy();
		coins.splice(i, 1);
	}
	// Chickens
	var cSpawns = chickenSpawns[waveIdx % chickenSpawns.length];
	for (var i = 0; i < cSpawns.length; i++) {
		var c = new Chicken();
		c.x = cSpawns[i].x;
		c.y = cSpawns[i].y;
		chickens.push(c);
		game.addChild(c);
	}
	// Coins
	var coinSp = coinSpawns[waveIdx % coinSpawns.length];
	for (var i = 0; i < coinSp.length; i++) {
		var coin = new Coin();
		coin.x = coinSp[i].x;
		coin.y = coinSp[i].y;
		coins.push(coin);
		game.addChild(coin);
	}
}
// --- MUSIC ---
LK.playMusic('mainTheme');
// --- MAPS/ENVIRONMENTS ---
var environments = [{
	sky: 0x87ceeb,
	ground: 0x7ec850
},
// blue sky, green grass
{
	sky: 0xf7e9a0,
	ground: 0xe0c97f
},
// desert
{
	sky: 0x9ecae1,
	ground: 0x8c8c8c
} // mountain/rocky
];
var currentEnv = 0;
function setEnvironment(idx) {
	sky.tint = environments[idx].sky;
	ground.tint = environments[idx].ground;
}
setEnvironment(currentEnv);
// Leaderboard name entry/update function removed as per new requirements
// --- UI UPDATE ---
function updateScore() {
	scoreTxt.setText(score);
}
function updateHp() {
	var s = '';
	for (var i = 0; i < david.hp; i++) s += '♥';
	for (var i = david.hp; i < david.maxHp; i++) s += '♡';
	hpTxt.setText(s);
}
updateScore();
updateHp();
// --- INPUT ---
var isTouching = false;
var lastTouchTick = 0;
// --- MACHINE GUN (AUTOMATIC FIRE) STATE ---
var autoFireInterval = 5; // frames between shots (12 shots/sec at 60fps)
var autoFireTick = 0;
var autoFireActive = false;
var autoFireTimeout = null;
game.down = function (x, y, obj) {
	isTouching = true;
	lastTouchTick = LK.ticks;
	// Move David to pointer/touch position (centered, free movement)
	if (gameActive && !bossDefeated) {
		var minX = david.arm.width / 2 + 60;
		var maxX = 2048 - david.arm.width / 2 - 60;
		var minY = 0 + david.arm.height / 2 + 60;
		var maxY = 2532;
		var newX = x;
		var newY = y;
		if (newX < minX) newX = minX;
		if (newX > maxX) newX = maxX;
		if (newY < minY) newY = minY;
		if (newY > maxY) newY = maxY;
		david.x = newX;
		david.y = newY;
	}
	// Start automatic fire
	if (gameActive && !bossDefeated && !autoFireActive) {
		autoFireActive = true;
		autoFireTick = 0;
		// Fire immediately
		fireMachineGun();
		// Set up interval for continuous fire
		autoFireTimeout = LK.setInterval(fireMachineGun, autoFireInterval * 1000 / 60);
	}
};
game.up = function (x, y, obj) {
	isTouching = false;
	// Stop automatic fire
	if (autoFireActive) {
		autoFireActive = false;
		if (autoFireTimeout) {
			LK.clearInterval(autoFireTimeout);
			autoFireTimeout = null;
		}
	}
	// Only allow throw if touch was short (tap)
	if (gameActive && !bossDefeated && LK.ticks - lastTouchTick < 30) {
		// Do not fire a single shot here, as auto fire already handles it
	}
};
// Helper function for machine gun fire
function fireMachineGun() {
	if (!gameActive || bossDefeated) return;
	if (!isTouching) return;
	var stone = david.throwStone();
	if (stone) {
		stones.push(stone);
		// If the stone is a Laser, add it after all giants to ensure it's above them
		if (stone instanceof Laser) {
			// Always add the laser to the top of the display list so it is visible above all giants and other objects
			// Remove if already present, then add to top
			var idx = game.children.indexOf(stone);
			if (idx !== -1) {
				game.children.splice(idx, 1);
			}
			game.addChild(stone);
			if (game.children[game.children.length - 1] !== stone) {
				var idx2 = game.children.indexOf(stone);
				if (idx2 !== -1) {
					game.children.splice(idx2, 1);
					game.children.push(stone);
				}
			}
			stone.parent = game;
			if (typeof stone.onAdded === "function") stone.onAdded();
		} else {
			game.addChild(stone);
		}
		// Arm can't throw again until next full rotation
		LK.setTimeout(function () {
			david.slingReady = true;
		}, 400);
	}
}
game.move = function (x, y, obj) {
	// Move David to pointer/touch position (centered, free movement)
	if (gameActive && !bossDefeated) {
		var minX = david.arm.width / 2 + 60;
		var maxX = 2048 - david.arm.width / 2 - 60;
		var minY = 0 + david.arm.height / 2 + 60;
		var maxY = 2532; // bottom of screen
		var newX = x;
		var newY = y;
		if (newX < minX) newX = minX;
		if (newX > maxX) newX = maxX;
		if (newY < minY) newY = minY;
		if (newY > maxY) newY = maxY;
		david.x = newX;
		david.y = newY;
	}
};
// --- GAME LOOP ---
// --- GIANT GROUP SPAWN EVERY 5 SECONDS (3-5 GIANTS PER GROUP) ---
var giantGroupTimer = 0;
var giantGroupInterval = 5 * 60; // 5 seconds * 60 FPS
game.update = function () {
	if (!gameActive) return;
	// Spawn a group of 3-5 giants every 5 seconds, unless boss is active
	if (!bossActive) {
		giantGroupTimer++;
		if (giantGroupTimer >= giantGroupInterval) {
			var groupSize = 3 + Math.floor(Math.random() * 3); // 3, 4, or 5
			for (var i = 0; i < groupSize; i++) {
				var g = new Giant();
				g.x = 400 + Math.random() * 1200;
				g.y = -200 - i * 80; // stagger vertically so they don't overlap exactly
				giants.push(g);
				game.addChild(g);
				// Also spawn a gold coin for this giant
				var newCoin = new Coin();
				newCoin.x = 400 + Math.random() * 1200;
				newCoin.y = 400 + Math.random() * 1800;
				coins.push(newCoin);
				game.addChild(newCoin);
			}
			giantGroupTimer = 0;
		}
	} else {
		// Reset timer if boss is active so we don't get a burst after boss
		giantGroupTimer = 0;
	}
	// --- SCROLLING LOGIC ---
	scrollY += scrollSpeed;
	// Move all world elements up by scrollSpeed
	sky.y = -scrollY;
	ground.y = 2532 - scrollY;
	david.y -= scrollSpeed;
	// Environment change per wave
	if (wave - 1 < environments.length) {
		setEnvironment(wave - 1);
	}
	// --- WEAPON/ITEM SPAWNS ---
	// No weapon unlocks or backpacks for machine gun only mode
	// Heart: appears at 5:00, only once, near center
	if (minutes === 5 && !heart && !heartCollected) {
		heart = new Heart();
		heart.x = 1024;
		heart.y = 1366;
		game.addChild(heart);
	}
	// David update
	david.update();
	// Stones update
	for (var i = stones.length - 1; i >= 0; i--) {
		var s = stones[i];
		s.update();
		s.y -= scrollSpeed; // move stone up with world
		// Remove if off screen (top or bottom)
		if (s.x > 2048 || s.y < -100 || s.x < -100 || s.y > 2732) {
			s.destroy();
			stones.splice(i, 1);
			continue;
		}
	}
	// Chickens update and collect
	for (var i = chickens.length - 1; i >= 0; i--) {
		var c = chickens[i];
		c.update();
		c.y -= scrollSpeed; // move up with world
		if (!c.collected && c.intersects(david)) {
			c.collect();
			chickens.splice(i, 1);
			if (david.hp < david.maxHp) {
				david.hp++;
				updateHp();
			}
			// Optional: play sound here if you have a chicken collect sound
		}
	}
	// Backpacks update and collect
	// (No backpacks in machine gun only mode)
	// Heart update and collect
	if (heart && !heart.collected) {
		heart.update();
		heart.y -= scrollSpeed;
		if (heart.intersects(david)) {
			heart.collect();
			heartCollected = true;
			if (david.hp < david.maxHp) {
				david.hp++;
				updateHp();
			}
			heart = null;
		}
	}
	// Coins update and collect
	for (var i = coins.length - 1; i >= 0; i--) {
		var coin = coins[i];
		coin.update();
		coin.y -= scrollSpeed; // move up with world
		if (!coin.collected && coin.intersects(david)) {
			coin.collect();
			coins.splice(i, 1);
			score += 5;
			updateScore();
			// Optional: play sound here if you have a coin collect sound
			// Respawn a new coin at a random location after collection
			var newCoin = new Coin();
			newCoin.x = 400 + Math.random() * 1200;
			newCoin.y = 400 + Math.random() * 1800;
			coins.push(newCoin);
			game.addChild(newCoin);
		}
	}
	// Giants update
	for (var j = giants.length - 1; j >= 0; j--) {
		var g = giants[j];
		g.update();
		g.y -= scrollSpeed; // move up with world
		// Remove if off screen (bottom)
		if (g.y < -300) {
			g.destroy();
			giants.splice(j, 1);
			continue;
		}
		// Collision with David
		if (g.active && g.intersects(david)) {
			g.active = false;
			g.destroy();
			giants.splice(j, 1);
			david.takeDamage(1);
			updateHp();
			if (david.hp <= 0) {
				LK.effects.flashScreen(0xff0000, 1000);
				LK.showGameOver();
				gameActive = false;
				return;
			}
			continue;
		}
		// Stones/projectiles hit giant
		// --- Laser: only damage the closest giant in front of David, and always visible above giants ---
		for (var k = stones.length - 1; k >= 0; k--) {
			var s2 = stones[k];
			if (s2 instanceof Laser && s2.active) {
				// Find the closest active giant in front of David (y > 0, lowest y)
				var closestGiant = null;
				var minDist = Infinity;
				for (var m = 0; m < giants.length; m++) {
					var g2 = giants[m];
					if (g2.active && g2.y < david.y && g2.y > -300) {
						var dist = Math.abs(g2.y - david.y);
						if (dist < minDist) {
							minDist = dist;
							closestGiant = g2;
						}
					}
				}
				if (closestGiant && closestGiant.active && s2.active && closestGiant.intersects(s2)) {
					closestGiant.takeDamage(s2.damage);
					s2.active = false;
					s2.destroy();
					stones.splice(k, 1);
					if (!closestGiant.active) {
						score += 1;
						updateScore();
					}
				}
				// Always keep the laser above all giants and other objects, every frame
				if (s2.parent === game) {
					var idx = game.children.indexOf(s2);
					if (idx !== -1 && idx !== game.children.length - 1) {
						game.children.splice(idx, 1);
						game.children.push(s2);
					}
				}
				continue;
			}
			// Non-laser projectiles
			if (g.active && s2.active && g.intersects(s2)) {
				g.takeDamage(s2.damage);
				if (s2 instanceof Bazooka) {
					s2.pierce--;
					if (s2.pierce <= 0) {
						s2.active = false;
						s2.destroy();
						stones.splice(k, 1);
					}
				} else {
					s2.active = false;
					s2.destroy();
					stones.splice(k, 1);
				}
				if (!g.active) {
					score += 1;
					updateScore();
				}
				break;
			}
		}
	}
	// Boss update
	if (bossActive && boss && boss.active) {
		boss.update();
		boss.y -= scrollSpeed; // move up with world
		// David can shoot at boss as soon as boss appears
		david.slingReady = true;
		// --- BOSS BOMB THROWING LOGIC ---
		// Boss throws bombs if David is far away (horizontally)
		if (!boss._bombCooldown) boss._bombCooldown = 0;
		boss._bombCooldown--;
		var bossToDavidDist = Math.abs(boss.x - david.x);
		if (bossToDavidDist > 400 && boss._bombCooldown <= 0) {
			// Throw a bomb toward David
			if (!boss._bombs) boss._bombs = [];
			var bomb = new BossBomb();
			bomb.x = boss.x;
			bomb.y = boss.y - boss.height * boss.scale.y / 2;
			// Calculate velocity toward David's current position
			var dx = david.x - boss.x;
			var dy = david.y - boss.y;
			var dist = Math.sqrt(dx * dx + dy * dy);
			var speed = 18 + Math.random() * 4;
			bomb.vx = dx / dist * speed;
			bomb.vy = dy / dist * speed * 0.7 - 6; // arc upward
			boss._bombs.push(bomb);
			game.addChild(bomb);
			boss._bombCooldown = 90 + Math.floor(Math.random() * 60); // 1.5s cooldown
		}
		// Update boss bombs
		if (boss._bombs) {
			for (var b = boss._bombs.length - 1; b >= 0; b--) {
				var bomb = boss._bombs[b];
				bomb.update();
				bomb.y -= scrollSpeed;
				// Bomb hits David
				if (!bomb.hit && bomb.intersects(david)) {
					bomb.hit = true;
					bomb.explode();
					boss._bombs.splice(b, 1);
					david.takeDamage(1);
					updateHp();
					if (david.hp <= 0) {
						LK.effects.flashScreen(0xff0000, 1000);
						LK.showGameOver();
						gameActive = false;
						return;
					}
					continue;
				}
				// Remove if off screen or exploded
				if (bomb.y > 2732 || bomb.y < -100 || bomb._exploded) {
					bomb.destroy();
					boss._bombs.splice(b, 1);
				}
			}
		}
		// --- BOSS WHIP ATTACK LOGIC ---
		// Boss whips if David is close horizontally
		if (!boss._whipCooldown) boss._whipCooldown = 0;
		boss._whipCooldown--;
		if (bossToDavidDist <= 400 && boss._whipCooldown <= 0) {
			// Whip attack: create a whip hitbox in front of boss
			if (!boss._whipHitbox) {
				boss._whipHitbox = new BossWhip();
				boss._whipHitbox.x = boss.x + (boss.x < david.x ? 120 * boss.scale.x : -120 * boss.scale.x);
				boss._whipHitbox.y = boss.y - boss.height * boss.scale.y / 2 + 80 * boss.scale.y;
				boss._whipHitbox.scale.x = boss.scale.x;
				boss._whipHitbox.scale.y = boss.scale.y;
				game.addChild(boss._whipHitbox);
			}
			boss._whipHitbox._life = 0;
			boss._whipCooldown = 60 + Math.floor(Math.random() * 30); // 1s cooldown
		}
		// Update whip hitbox
		if (boss._whipHitbox) {
			boss._whipHitbox._life++;
			boss._whipHitbox.y -= scrollSpeed;
			// Whip lasts for 15 frames
			if (boss._whipHitbox._life > 15) {
				boss._whipHitbox.destroy();
				boss._whipHitbox = null;
			} else if (!boss._whipHitbox.hit && boss._whipHitbox.intersects(david)) {
				boss._whipHitbox.hit = true;
				david.takeDamage(1);
				updateHp();
				if (david.hp <= 0) {
					LK.effects.flashScreen(0xff0000, 1000);
					LK.showGameOver();
					gameActive = false;
					return;
				}
			}
		}
		// Boss hits David (body collision)
		if (boss.intersects(david)) {
			boss.active = false;
			boss.destroy();
			david.takeDamage(2);
			updateHp();
			LK.effects.flashScreen(0xff0000, 1000);
			LK.showGameOver();
			gameActive = false;
			return;
		}
		// Stones/projectiles hit boss
		for (var k = stones.length - 1; k >= 0; k--) {
			var s2 = stones[k];
			if (boss.active && s2.active && boss.intersects(s2)) {
				boss.takeDamage(s2.damage);
				if (s2 instanceof Bazooka) {
					s2.pierce--;
					if (s2.pierce <= 0) {
						s2.active = false;
						s2.destroy();
						stones.splice(k, 1);
					}
				} else {
					s2.active = false;
					s2.destroy();
					stones.splice(k, 1);
				}
				if (!boss.active) {
					score += 10;
					updateScore();
					bossDefeated = true;
					LK.effects.flashScreen(0x00ff00, 1200);
					// Show "Next Chapter" if not last chapter, else show "You Win"
					if (chapter < 3) {
						// Show "Next Chapter" overlay
						var nextChapterTxt = new Text2('Next Chapter', {
							size: 200,
							fill: "#fff"
						});
						nextChapterTxt.anchor.set(0.5, 0.5);
						nextChapterTxt.x = 1024;
						nextChapterTxt.y = 1200;
						LK.gui.center.addChild(nextChapterTxt);
						// Prepare for next chapter after short delay
						LK.setTimeout(function () {
							LK.gui.center.removeChild(nextChapterTxt);
							// Advance chapter, reset state
							chapter++;
							wave = 1;
							giantsToSpawn = 5;
							giantsSpawned = 0;
							spawnTimer = 60;
							bossActive = false;
							bossDefeated = false;
							gameActive = true;
							// Scale up boss for next chapter
							bossScale = bossScale * 2;
							// Cycle environment
							currentEnv = (currentEnv + 1) % environments.length;
							setEnvironment(currentEnv);
							// Move David back to start
							david.x = 1024;
							david.y = 2300;
							// Remove all stones, chickens, coins, backpacks, heart
							for (var i = stones.length - 1; i >= 0; i--) {
								stones[i].destroy();
								stones.splice(i, 1);
							}
							for (var i = chickens.length - 1; i >= 0; i--) {
								chickens[i].destroy();
								chickens.splice(i, 1);
							}
							for (var i = coins.length - 1; i >= 0; i--) {
								coins[i].destroy();
								coins.splice(i, 1);
							}
							for (var i = backpacks.length - 1; i >= 0; i--) {
								backpacks[i].destroy();
								backpacks.splice(i, 1);
							}
							if (heart) {
								heart.destroy();
								heart = null;
							}
							heartCollected = false;
							// Reset scroll
							scrollY = 0;
							sky.y = 0;
							ground.y = 2532;
							// Reset weapons
							weapon = WEAPON_LASER;
							weaponUnlocked = [true, false, false];
							weaponLast = WEAPON_LASER;
							weaponTxt.setText(weaponNames[0]);
							// Reset HP
							david.hp = david.maxHp;
							updateHp();
							// Spawn collectibles for new wave
							spawnCollectiblesForWave(wave - 1);
						}, 2200);
					} else {
						// Last chapter, keep spawning giants forever
						bossActive = false;
						bossDefeated = false;
						gameActive = true;
						// Remove all stones, chickens, coins, backpacks, heart
						for (var i = stones.length - 1; i >= 0; i--) {
							stones[i].destroy();
							stones.splice(i, 1);
						}
						for (var i = chickens.length - 1; i >= 0; i--) {
							chickens[i].destroy();
							chickens.splice(i, 1);
						}
						for (var i = coins.length - 1; i >= 0; i--) {
							coins[i].destroy();
							coins.splice(i, 1);
						}
						for (var i = backpacks.length - 1; i >= 0; i--) {
							backpacks[i].destroy();
							backpacks.splice(i, 1);
						}
						if (heart) {
							heart.destroy();
							heart = null;
						}
						heartCollected = false;
						// Reset scroll
						scrollY = 0;
						sky.y = 0;
						ground.y = 2532;
						// Move David back to start
						david.x = 1024;
						david.y = 2300;
						// Reset HP
						david.hp = david.maxHp;
						updateHp();
						// Continue spawning giants forever
						wave++;
						giantsToSpawn += 3;
						giantsSpawned = 0;
						spawnTimer = 60;
						spawnCollectiblesForWave((wave - 1) % chickenSpawns.length);
					}
					return;
				}
				break;
			}
		}
	}
	// --- SPAWN LOGIC (vertical, from top) ---
	// Giants only spawn if boss is not active
	if (!bossActive) {
		// Only allow up to 5 giants at a time
		if (giants.length < 5 && giantsSpawned < giantsToSpawn) {
			spawnTimer--;
			if (spawnTimer <= 0) {
				var g = new Giant();
				g.x = 400 + Math.random() * 1200; // random horizontal position
				g.y = -200; // spawn just above the top
				giants.push(g);
				game.addChild(g);
				giantsSpawned++;
				// --- SPAWN GOLD COIN FOR EACH GIANT ---
				var newCoin = new Coin();
				newCoin.x = 400 + Math.random() * 1200;
				newCoin.y = 400 + Math.random() * 1800;
				coins.push(newCoin);
				game.addChild(newCoin);
				spawnTimer = 60 + Math.floor(Math.random() * 60);
			}
		} else if (giants.length === 0) {
			// Next wave or boss
			if (wave < 3) {
				wave++;
				giantsToSpawn += 3;
				giantsSpawned = 0;
				spawnTimer = 60;
				spawnCollectiblesForWave(wave - 1); // spawn chickens and coins for new wave
			} else {
				// Boss time: pause giants, spawn boss
				bossActive = true;
				boss = new BossGiant();
				// Scale boss size and HP per chapter
				boss.x = 1024; // center horizontally
				boss.y = -300; // spawn above the top
				boss.scale.x = bossScale;
				boss.scale.y = bossScale;
				boss.hp = 15 * bossScale;
				game.addChild(boss);
				spawnCollectiblesForWave(wave - 1); // spawn for boss wave
			}
		}
	}
	// Giants will continuously respawn and keep coming without end
	// (Removed bossDefeated check and chapter2 popup, giants always respawn)
};

===================================================================
--- original.js
+++ change.js
@@ -386,36 +386,27 @@
 	};
 	self.throwStone = function () {
 		if (!self.slingReady || self.stoneCooldown > 0) return null;
 		self.slingReady = false;
-		self.stoneCooldown = 30; // half a second
+		self.stoneCooldown = 5; // fast fire rate for machine gun
 		LK.getSound('throw').play();
 		// Calculate projectile start position (end of arm)
 		var angle = self.armAngle;
 		var sx = self.x + Math.cos(angle) * (body.width / 2 + self.arm.height * 0.9);
 		var sy = self.y - body.height + 40 + Math.sin(angle) * (self.arm.height * 0.9);
-		var proj = null;
-		// Only allow Catapult (stone)
-		if (weapon === WEAPON_CATAPULT) {
-			proj = new Stone();
-			proj.x = sx;
-			proj.y = sy;
-			// Always fire straight upwards for machine gun
-			proj.vx = 0;
-			proj.vy = -28;
-		}
+		// Always fire a machine gun bullet straight upwards
+		var proj = new Stone();
+		proj.x = sx;
+		proj.y = sy;
+		proj.vx = 0;
+		proj.vy = -38; // faster than stone for machine gun
 		return proj;
 	};
 	self.takeDamage = function (dmg) {
 		self.hp -= dmg;
 		if (self.hp < 0) self.hp = 0;
 		LK.effects.flashObject(self, 0xff0000, 400);
-		// Weapon revert on damage
-		if (weapon > WEAPON_CATAPULT) {
-			weaponUnlocked[weapon] = false;
-			weapon = WEAPON_CATAPULT;
-			weaponTxt.setText(weaponNames[0]);
-		}
+		// No weapon revert on damage in machine gun only mode
 	};
 	return self;
 });
 // Giant enemy
@@ -631,22 +622,19 @@
 david.x = 1024; // center horizontally
 david.y = 2300; // near bottom, above ground
 game.addChild(david);
 // --- WEAPON SYSTEM ---
-var WEAPON_CATAPULT = 0;
-var WEAPON_LASER = 1;
-var WEAPON_PLASMA = 2;
-var WEAPON_BAZOOKA = 3;
-// Only allow Catapult, Laser, Plasma, Bazooka in UI and logic
-var weaponNames = ["Catapult", "Laser", "Plasma", "Bazooka"];
-var weaponColors = [0xaaaaaa, 0xff0000, 0xffe600, 0x00ff00];
-// Start with Catapult, Laser and others are locked
-var weapon = WEAPON_CATAPULT;
-var weaponUnlocked = [true, false, false, false]; // Only Catapult unlocked at start
-var weaponLast = WEAPON_CATAPULT; // for reverting on damage
-var weaponTimeouts = [0, 0, 0, 0]; // for time-limited weapons if needed
+// Machine Gun is the only weapon
+var WEAPON_MACHINEGUN = 0;
+var weaponNames = ["Machine Gun"];
+var weaponColors = [0x888888];
+// Start with Machine Gun only
+var weapon = WEAPON_MACHINEGUN;
+var weaponUnlocked = [true]; // Only Machine Gun unlocked
+var weaponLast = WEAPON_MACHINEGUN;
+var weaponTimeouts = [0];
 // Weapon UI
-var weaponTxt = new Text2('Catapult', {
+var weaponTxt = new Text2('Machine Gun', {
 	size: 80,
 	fill: "#fff"
 });
 weaponTxt.anchor.set(0.5, 0);
@@ -975,44 +963,9 @@
 	if (wave - 1 < environments.length) {
 		setEnvironment(wave - 1);
 	}
 	// --- WEAPON/ITEM SPAWNS ---
-	// Timed weapon unlocks
-	var minutes = Math.floor(LK.ticks / 60 / 60);
-	var seconds = Math.floor(LK.ticks / 60 % 60);
-	// Laser backpack: appears at 2:00, disappears at 5:00 or if collected
-	if (minutes === 2 && !weaponUnlocked[WEAPON_LASER] && !backpacks.some(function (b) {
-		return b.type === WEAPON_LASER;
-	})) {
-		var bp = new Backpack();
-		bp.type = WEAPON_LASER;
-		bp.x = 400 + Math.random() * 1200;
-		bp.y = 800 + Math.random() * 800;
-		backpacks.push(bp);
-		game.addChild(bp);
-	}
-	// Plasma backpack: appears at 5:00, disappears at 7:00 or if collected
-	if (minutes === 5 && !weaponUnlocked[WEAPON_PLASMA] && !backpacks.some(function (b) {
-		return b.type === WEAPON_PLASMA;
-	})) {
-		var bp = new Backpack();
-		bp.type = WEAPON_PLASMA;
-		bp.x = 400 + Math.random() * 1200;
-		bp.y = 800 + Math.random() * 800;
-		backpacks.push(bp);
-		game.addChild(bp);
-	}
-	// Bazooka backpack: appears at 7:00, no time limit
-	if (minutes === 7 && !weaponUnlocked[WEAPON_BAZOOKA] && !backpacks.some(function (b) {
-		return b.type === WEAPON_BAZOOKA;
-	})) {
-		var bp = new Backpack();
-		bp.type = WEAPON_BAZOOKA;
-		bp.x = 400 + Math.random() * 1200;
-		bp.y = 800 + Math.random() * 800;
-		backpacks.push(bp);
-		game.addChild(bp);
-	}
+	// No weapon unlocks or backpacks for machine gun only mode
 	// Heart: appears at 5:00, only once, near center
 	if (minutes === 5 && !heart && !heartCollected) {
 		heart = new Heart();
 		heart.x = 1024;
@@ -1048,21 +1001,9 @@
 			// Optional: play sound here if you have a chicken collect sound
 		}
 	}
 	// Backpacks update and collect
-	for (var i = backpacks.length - 1; i >= 0; i--) {
-		var bp = backpacks[i];
-		bp.update();
-		bp.y -= scrollSpeed;
-		if (!bp.collected && bp.intersects(david)) {
-			bp.collect();
-			backpacks.splice(i, 1);
-			weaponLast = weapon;
-			weapon = bp.type;
-			weaponUnlocked[weapon] = true;
-			weaponTxt.setText(weaponNames[weapon]);
-		}
-	}
+	// (No backpacks in machine gun only mode)
 	// Heart update and collect
 	if (heart && !heart.collected) {
 		heart.update();
 		heart.y -= scrollSpeed;