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

/**** 
* Classes
****/ 
var Castle = Container.expand(function () {
	var self = Container.call(this);
	// Castle base
	var castleBase = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 0,
		y: 0,
		scaleX: 2.0,
		scaleY: 1.5,
		tint: 0x696969
	});
	// Castle towers
	var tower1 = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: -80,
		y: -100,
		scaleX: 0.8,
		scaleY: 1.8,
		tint: 0x555555
	});
	var tower2 = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 80,
		y: -100,
		scaleX: 0.8,
		scaleY: 1.8,
		tint: 0x555555
	});
	// Castle flags
	var flag1 = self.attachAsset('scroll', {
		anchorX: 0.0,
		anchorY: 1.0,
		x: -80,
		y: -260,
		scaleX: 1.2,
		scaleY: 1.0,
		tint: 0xff0000
	});
	var flag2 = self.attachAsset('scroll', {
		anchorX: 0.0,
		anchorY: 1.0,
		x: 80,
		y: -260,
		scaleX: 1.2,
		scaleY: 1.0,
		tint: 0x0000ff
	});
	self.speed = -3;
	self.update = function () {
		self.x += self.speed;
		// Flags wave in wind
		flag1.rotation = Math.sin(LK.ticks * 0.1) * 0.2;
		flag2.rotation = Math.sin(LK.ticks * 0.1 + 1) * 0.2;
	};
	return self;
});
var Cloud = Container.expand(function (size) {
	var self = Container.call(this);
	var cloudType = size || 'medium';
	var cloudGraphics = self.attachAsset('cloud_' + cloudType, {
		anchorX: 0.5,
		anchorY: 0.5,
		alpha: 0.7
	});
	self.speed = -1 - Math.random() * 2;
	self.driftY = Math.random() * 0.5 - 0.25;
	self.update = function () {
		self.x += self.speed;
		self.y += self.driftY;
		// Gentle cloud movement with fog effect
		cloudGraphics.alpha = 0.2 + Math.sin(LK.ticks * 0.01) * 0.1;
	};
	return self;
});
var Dragon = Container.expand(function () {
	var self = Container.call(this);
	// Main dragon body (center)
	var dragonBody = self.attachAsset('dragon_body', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.8,
		scaleY: 1.6,
		tint: 0xff4500
	});
	// Body segments for segmented look
	var bodySegment1 = self.attachAsset('dragon_body', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -50,
		y: 3,
		scaleX: 1.6,
		scaleY: 1.4,
		tint: 0xe03e00
	});
	var bodySegment2 = self.attachAsset('dragon_body', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -90,
		y: 8,
		scaleX: 1.4,
		scaleY: 1.2,
		tint: 0xcc3700
	});
	var bodySegment3 = self.attachAsset('dragon_body', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -125,
		y: 12,
		scaleX: 1.2,
		scaleY: 1.0,
		tint: 0xb83500
	});
	// Dragon head with neck
	var dragonNeck = self.attachAsset('dragon_body', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 80,
		y: -10,
		scaleX: 1.0,
		scaleY: 0.8,
		tint: 0xd4451a
	});
	var dragonHead = self.attachAsset('dragon_head', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 110,
		y: -20,
		scaleX: 1.8,
		scaleY: 1.7,
		tint: 0xb30000
	});
	// Dragon snout details
	var snout = self.attachAsset('dragon_head', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 140,
		y: -15,
		scaleX: 0.8,
		scaleY: 0.6,
		tint: 0x990000
	});
	// Dragon eyes
	var leftEye = self.attachAsset('gem', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 120,
		y: -28,
		scaleX: 0.35,
		scaleY: 0.35,
		tint: 0x00ff00
	});
	var rightEye = self.attachAsset('gem', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 120,
		y: -12,
		scaleX: 0.35,
		scaleY: 0.35,
		tint: 0x00ff00
	});
	// Eye pupils
	var leftPupil = self.attachAsset('gem', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 122,
		y: -28,
		scaleX: 0.15,
		scaleY: 0.15,
		tint: 0x000000
	});
	var rightPupil = self.attachAsset('gem', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 122,
		y: -12,
		scaleX: 0.15,
		scaleY: 0.15,
		tint: 0x000000
	});
	// Dragon nostrils
	var leftNostril = self.attachAsset('gem', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 148,
		y: -18,
		scaleX: 0.1,
		scaleY: 0.1,
		tint: 0x000000
	});
	var rightNostril = self.attachAsset('gem', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 148,
		y: -12,
		scaleX: 0.1,
		scaleY: 0.1,
		tint: 0x000000
	});
	// Dragon tail segments
	var dragonTail1 = self.attachAsset('dragon_tail', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -155,
		y: 5,
		scaleX: 1.0,
		scaleY: 1.8,
		tint: 0xaa2200
	});
	var dragonTail2 = self.attachAsset('dragon_tail', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -185,
		y: 10,
		scaleX: 0.8,
		scaleY: 1.5,
		tint: 0x993300
	});
	var dragonTail3 = self.attachAsset('dragon_tail', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -210,
		y: 15,
		scaleX: 0.6,
		scaleY: 1.2,
		tint: 0x882200
	});
	// Main wings
	var leftWing = self.attachAsset('dragon_wing_left', {
		anchorX: 0.8,
		anchorY: 0.5,
		x: -30,
		y: -35,
		scaleX: 1.8,
		scaleY: 1.6
	});
	var rightWing = self.attachAsset('dragon_wing_right', {
		anchorX: 0.2,
		anchorY: 0.5,
		x: -30,
		y: 35,
		scaleX: 1.8,
		scaleY: 1.6
	});
	// Wing membranes (inner wing details)
	var leftWingMembrane = self.attachAsset('dragon_wing_left', {
		anchorX: 0.8,
		anchorY: 0.5,
		x: -25,
		y: -32,
		scaleX: 1.4,
		scaleY: 1.2,
		tint: 0xcc5533,
		alpha: 0.7
	});
	var rightWingMembrane = self.attachAsset('dragon_wing_right', {
		anchorX: 0.2,
		anchorY: 0.5,
		x: -25,
		y: 32,
		scaleX: 1.4,
		scaleY: 1.2,
		tint: 0xcc5533,
		alpha: 0.7
	});
	// Wing bones/struts
	var leftWingBone1 = self.attachAsset('dragon_tail', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -50,
		y: -45,
		scaleX: 0.3,
		scaleY: 0.8,
		tint: 0x886644,
		rotation: -0.5
	});
	var leftWingBone2 = self.attachAsset('dragon_tail', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -70,
		y: -40,
		scaleX: 0.3,
		scaleY: 0.6,
		tint: 0x886644,
		rotation: -0.3
	});
	var rightWingBone1 = self.attachAsset('dragon_tail', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -50,
		y: 45,
		scaleX: 0.3,
		scaleY: 0.8,
		tint: 0x886644,
		rotation: 0.5
	});
	var rightWingBone2 = self.attachAsset('dragon_tail', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -70,
		y: 40,
		scaleX: 0.3,
		scaleY: 0.6,
		tint: 0x886644,
		rotation: 0.3
	});
	// Dragon horns
	var leftHorn = self.attachAsset('dragon_tail', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 105,
		y: -45,
		scaleX: 0.2,
		scaleY: 0.4,
		tint: 0x444444,
		rotation: -0.3
	});
	var rightHorn = self.attachAsset('dragon_tail', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 115,
		y: -45,
		scaleX: 0.2,
		scaleY: 0.4,
		tint: 0x444444,
		rotation: 0.3
	});
	// Dragon belly scales
	var bellyScale1 = self.attachAsset('dragon_body', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: 0,
		y: 25,
		scaleX: 1.4,
		scaleY: 0.6,
		tint: 0xffaa44,
		alpha: 0.8
	});
	var bellyScale2 = self.attachAsset('dragon_body', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -45,
		y: 28,
		scaleX: 1.2,
		scaleY: 0.5,
		tint: 0xffaa44,
		alpha: 0.8
	});
	var bellyScale3 = self.attachAsset('dragon_body', {
		anchorX: 0.5,
		anchorY: 0.5,
		x: -85,
		y: 30,
		scaleX: 1.0,
		scaleY: 0.4,
		tint: 0xffaa44,
		alpha: 0.8
	});
	// Store references for animations
	self.dragonBody = dragonBody;
	self.dragonHead = dragonHead;
	self.leftWing = leftWing;
	self.rightWing = rightWing;
	self.dragonTail = dragonTail1;
	self.bodySegment1 = bodySegment1;
	self.bodySegment2 = bodySegment2;
	self.velocity = 0;
	self.maxVelocity = 10;
	self.gravity = 0.4;
	self.flapPower = -16;
	self.isFlapping = false;
	self.wingFlapTimer = 0;
	self.flap = function () {
		self.velocity = self.flapPower;
		self.isFlapping = true;
		self.wingFlapTimer = 15; // Duration for wing flap animation
		LK.getSound('flap').play();
		// Wing flap animation with smoother tweens
		tween(self.leftWing, {
			rotation: -0.8,
			scaleY: 1.8,
			scaleX: 1.6
		}, {
			duration: 80,
			easing: tween.easeOut
		});
		tween(self.rightWing, {
			rotation: 0.8,
			scaleY: 1.8,
			scaleX: 1.6
		}, {
			duration: 80,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				// Return wings to normal position
				tween(self.leftWing, {
					rotation: 0.1,
					scaleY: 1.6,
					scaleX: 1.8
				}, {
					duration: 120,
					easing: tween.easeInOut
				});
				tween(self.rightWing, {
					rotation: -0.1,
					scaleY: 1.6,
					scaleX: 1.8
				}, {
					duration: 120,
					easing: tween.easeInOut
				});
			}
		});
		// Head bob animation with better smoothness
		tween(self.dragonHead, {
			y: -30,
			rotation: -0.1
		}, {
			duration: 60,
			easing: tween.easeOut,
			onFinish: function onFinish() {
				tween(self.dragonHead, {
					y: -20,
					rotation: 0
				}, {
					duration: 80,
					easing: tween.easeIn
				});
			}
		});
	};
	self.update = function () {
		// Apply gravity - Flappy Bird style
		self.velocity += self.gravity;
		// Limit velocity to prevent too fast falling
		if (self.velocity > self.maxVelocity) {
			self.velocity = self.maxVelocity;
		}
		if (self.velocity < -self.maxVelocity) {
			self.velocity = -self.maxVelocity;
		}
		// Update position
		self.y += self.velocity;
		// Flappy Bird style rotation based on velocity
		var targetRotation = self.velocity * 0.08;
		if (targetRotation > 0.5) targetRotation = 0.5;
		if (targetRotation < -0.4) targetRotation = -0.4;
		// Smooth rotation transitions
		tween.stop(self.dragonBody);
		tween(self.dragonBody, {
			rotation: targetRotation
		}, {
			duration: 100,
			easing: tween.easeOut
		});
		tween.stop(self.dragonHead);
		tween(self.dragonHead, {
			rotation: targetRotation * 0.6
		}, {
			duration: 80,
			easing: tween.easeOut
		});
		tween.stop(self.dragonTail);
		tween(self.dragonTail, {
			rotation: targetRotation * 1.4
		}, {
			duration: 120,
			easing: tween.easeOut
		});
		// Body segments follow with slight delay for more natural movement
		tween.stop(self.bodySegment1);
		tween(self.bodySegment1, {
			rotation: targetRotation * 0.8
		}, {
			duration: 110,
			easing: tween.easeOut
		});
		tween.stop(self.bodySegment2);
		tween(self.bodySegment2, {
			rotation: targetRotation * 0.6
		}, {
			duration: 140,
			easing: tween.easeOut
		});
		// Wing flap timer countdown
		if (self.wingFlapTimer > 0) {
			self.wingFlapTimer--;
		}
		// Wings gentle movement when not actively flapping
		if (self.wingFlapTimer <= 0) {
			var gentleWingMovement = Math.sin(LK.ticks * 0.06) * 0.15;
			self.leftWing.rotation = gentleWingMovement + 0.1;
			self.rightWing.rotation = -gentleWingMovement - 0.1;
		}
		// Keep dragon on screen with kill zone boundaries
		if (self.y < 120) {
			self.y = 120;
			self.velocity = Math.max(0, self.velocity);
		}
		if (self.y > 2612) {
			self.y = 2612;
			self.velocity = Math.min(0, self.velocity);
		}
		self.isFlapping = self.wingFlapTimer > 0;
	};
	return self;
});
var Mountain = Container.expand(function () {
	var self = Container.call(this);
	// Mountain peak
	var mountainPeak = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 0,
		y: 0,
		scaleX: 3.0,
		scaleY: 2.5,
		tint: 0x696969
	});
	// Mountain side
	var mountainSide = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: -60,
		y: 0,
		scaleX: 2.5,
		scaleY: 2.0,
		tint: 0x778899
	});
	// Snow cap
	var snowCap = self.attachAsset('cloud_small', {
		anchorX: 0.5,
		anchorY: 1.0,
		x: 0,
		y: -200,
		scaleX: 1.5,
		scaleY: 0.6,
		tint: 0xfffafa
	});
	self.speed = -2;
	self.update = function () {
		self.x += self.speed;
	};
	return self;
});
var Obstacle = Container.expand(function (type) {
	var self = Container.call(this);
	var obstacleType = type || 'tree';
	self.speed = -4;
	self.passed = false;
	if (obstacleType === 'tree') {
		// Flappy Bird style tree pipe from bottom - much longer
		var treePipe = self.attachAsset('obstacle', {
			anchorX: 0.5,
			anchorY: 0.0,
			x: 0,
			y: 0,
			scaleX: 1.5,
			scaleY: 20.0,
			tint: 0x228b22
		});
		// Pipe cap at top
		var treeCap = self.attachAsset('obstacle', {
			anchorX: 0.5,
			anchorY: 0.0,
			x: 0,
			y: treePipe.height - 40,
			scaleX: 2.0,
			scaleY: 0.8,
			tint: 0x32cd32
		});
	} else if (obstacleType === 'rock') {
		// Rock obstacle from top - much longer
		var rockMain = self.attachAsset('obstacle', {
			anchorX: 0.5,
			anchorY: 1.0,
			x: 0,
			y: 0,
			scaleX: 1.8,
			scaleY: 18.0,
			tint: 0x696969
		});
		// Rock cap at bottom
		var rockCap = self.attachAsset('obstacle', {
			anchorX: 0.5,
			anchorY: 1.0,
			x: 0,
			y: -rockMain.height + 40,
			scaleX: 2.2,
			scaleY: 0.9,
			tint: 0x555555
		});
	}
	self.update = function () {
		self.x += self.speed;
	};
	return self;
});
var Scroll = Container.expand(function () {
	var self = Container.call(this);
	var scrollGraphics = self.attachAsset('scroll', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -4;
	self.collected = false;
	self.update = function () {
		self.x += self.speed;
		// Gentle sway animation
		scrollGraphics.rotation = Math.sin(LK.ticks * 0.02) * 0.1;
	};
	return self;
});
var Spike = Container.expand(function (type) {
	var self = Container.call(this);
	var spikeType = type || 'top';
	var spikeGraphics = self.attachAsset('spike_' + spikeType, {
		anchorX: 0.5,
		anchorY: 0.5
	});
	self.speed = -4;
	self.update = function () {
		self.x += self.speed;
		// Add menacing glow effect
		var glowIntensity = 0.8 + Math.sin(LK.ticks * 0.2) * 0.2;
		spikeGraphics.alpha = glowIntensity;
		// Subtle color shift between dark gray and red
		var colorShift = Math.sin(LK.ticks * 0.1);
		if (colorShift > 0.3) {
			spikeGraphics.tint = 0x4a0000; // Dark red
		} else {
			spikeGraphics.tint = 0x2c2c2c; // Dark gray
		}
	};
	return self;
});

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

/**** 
* Game Code
****/ 
// Game variables
var dragon;
var obstacles = [];
var scrolls = [];
var clouds = [];
var mountains = [];
var castles = [];
var topSpikes = [];
var bottomSpikes = [];
var gameSpeed = 1;
var spawnTimer = 0;
var scrollSpawnTimer = 0;
var cloudSpawnTimer = 0;
var spikeSpawnTimer = 0;
var distance = 0;
var speedMultiplier = 1.00;
// UI Elements
var scoreTxt = new Text2('Score: 0', {
	size: 60,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
var distanceTxt = new Text2('Distance: 0m', {
	size: 50,
	fill: 0xFFFFFF
});
distanceTxt.anchor.set(1, 0);
distanceTxt.x = -20;
distanceTxt.y = 80;
LK.gui.topRight.addChild(distanceTxt);
var speedTxt = new Text2('1.00x', {
	size: 50,
	fill: 0xFFFFFF
});
speedTxt.anchor.set(0, 0);
speedTxt.x = 120;
speedTxt.y = 20;
LK.gui.topLeft.addChild(speedTxt);
// Create dragon
dragon = game.addChild(new Dragon());
dragon.x = 400;
dragon.y = 1366;
// Make dragon smaller to fix hitbox
dragon.scaleX = 0.45;
dragon.scaleY = 0.45;
// Ensure dragon is always visible by setting maximum z-index
dragon.zIndex = 10000;
// Create permanent kill zones to prevent camping
createPermanentKillZones();
// Controls
game.down = function (x, y, obj) {
	dragon.flap();
};
game.move = function (x, y, obj) {
	// Optional: Allow continuous flapping while holding
};
game.up = function (x, y, obj) {
	// Release action if needed
};
// Spawn obstacle
function spawnObstacle() {
	// Create Flappy Bird style obstacles - always spawn in pairs with gap
	var gapSize = 400; // Size of gap between top and bottom obstacles
	var gapCenter = 800 + Math.random() * 1200; // Random vertical position for gap center
	// Bottom tree pipe
	var treeObstacle = new Obstacle('tree');
	treeObstacle.x = 2200;
	treeObstacle.y = gapCenter + gapSize / 2; // Position bottom of gap
	obstacles.push(treeObstacle);
	game.addChild(treeObstacle);
	// Top rock obstacle
	var rockObstacle = new Obstacle('rock');
	rockObstacle.x = 2200;
	rockObstacle.y = gapCenter - gapSize / 2; // Position top of gap
	obstacles.push(rockObstacle);
	game.addChild(rockObstacle);
}
// Spawn scroll
function spawnScroll() {
	var scroll = new Scroll();
	scroll.x = 2200;
	scroll.y = 400 + Math.random() * 1900;
	scrolls.push(scroll);
	game.addChild(scroll);
}
// Spawn cloud
function spawnCloud() {
	var cloudSizes = ['small', 'medium', 'large'];
	var size = cloudSizes[Math.floor(Math.random() * cloudSizes.length)];
	var cloud = new Cloud(size);
	cloud.x = 2200;
	cloud.y = 200 + Math.random() * 2000;
	cloud.zIndex = -200; // Put clouds in far background
	cloud.scaleX = 3.5; // Make clouds much bigger
	cloud.scaleY = 3.5;
	cloud.alpha = 0.3; // Add fog effect - make clouds more transparent
	clouds.push(cloud);
	game.addChild(cloud);
}
// Create permanent kill zones at top and bottom
function createPermanentKillZones() {
	// Top kill zone - continuous barrier
	for (var i = 0; i < 30; i++) {
		var topKillBrick = new Spike('top');
		topKillBrick.x = i * 80;
		topKillBrick.y = 30;
		topKillBrick.speed = 0; // Static, doesn't move
		topSpikes.push(topKillBrick);
		game.addChild(topKillBrick);
	}
	// Bottom kill zone - continuous barrier
	for (var j = 0; j < 30; j++) {
		var bottomKillBrick = new Spike('bottom');
		bottomKillBrick.x = j * 80;
		bottomKillBrick.y = 2702;
		bottomKillBrick.speed = 0; // Static, doesn't move
		bottomSpikes.push(bottomKillBrick);
		game.addChild(bottomKillBrick);
	}
}
// Spawn deadly spikes at top
function spawnTopSpikes() {
	for (var i = 0; i < 8; i++) {
		var spike = new Spike('top');
		spike.x = 2200 + i * 80;
		spike.y = 30;
		topSpikes.push(spike);
		game.addChild(spike);
	}
}
// Spawn deadly spikes at bottom
function spawnBottomSpikes() {
	for (var i = 0; i < 8; i++) {
		var spike = new Spike('bottom');
		spike.x = 2200 + i * 80;
		spike.y = 2702;
		bottomSpikes.push(spike);
		game.addChild(spike);
	}
}
// Spawn mountain environment
function spawnMountain() {
	var mountain = new Mountain();
	mountain.x = 2400;
	mountain.y = 2600 + Math.random() * 200; // Position at bottom
	mountain.zIndex = -100; // Put mountains in background
	mountain.scaleX = 4.0; // Make mountains much bigger
	mountain.scaleY = 4.0;
	mountain.alpha = 0.4; // Add fog effect - make mountains more transparent
	mountains.push(mountain);
	game.addChild(mountain);
}
// Spawn castle environment
function spawnCastle() {
	var castle = new Castle();
	castle.x = 2400;
	castle.y = 2500 + Math.random() * 200; // Position at bottom
	castle.zIndex = -100; // Put castles in background
	castle.scaleX = 3.5; // Make castles much bigger
	castle.scaleY = 3.5;
	castle.alpha = 0.5; // Add fog effect - make castles more transparent
	castles.push(castle);
	game.addChild(castle);
}
// Main game loop
game.update = function () {
	distance += gameSpeed;
	distanceTxt.setText('Distance: ' + Math.floor(distance / 10) + 'm');
	// Increase difficulty over time
	if (LK.ticks % 1800 === 0) {
		// Every 30 seconds
		gameSpeed += 0.2;
	}
	// Spawn obstacles - Flappy Bird style with dynamic spacing based on speed
	spawnTimer++;
	var dynamicSpawnDelay = Math.floor(160 + (speedMultiplier - 1) * 2000); // Increase spacing as speed increases
	if (spawnTimer > dynamicSpawnDelay) {
		// More consistent spacing like Flappy Bird, adjusted for speed
		spawnObstacle();
		spawnTimer = 0;
	}
	// Spawn scrolls (rare)
	scrollSpawnTimer++;
	if (scrollSpawnTimer > 600) {
		spawnScroll();
		scrollSpawnTimer = 0;
	}
	// Spawn clouds for atmosphere
	cloudSpawnTimer++;
	if (cloudSpawnTimer > 200 + Math.random() * 300) {
		spawnCloud();
		cloudSpawnTimer = 0;
	}
	// Spawn mountains (background environment)
	if (LK.ticks % 900 === 0) {
		spawnMountain();
	}
	// Spawn castles (background environment)  
	if (LK.ticks % 1200 === 0) {
		spawnCastle();
	}
	// Update and clean up mountains
	for (var m = mountains.length - 1; m >= 0; m--) {
		var mountain = mountains[m];
		if (mountain.x < -600) {
			mountain.destroy();
			mountains.splice(m, 1);
		}
	}
	// Update and clean up castles
	for (var ct = castles.length - 1; ct >= 0; ct--) {
		var castle = castles[ct];
		if (castle.x < -400) {
			castle.destroy();
			castles.splice(ct, 1);
		}
	}
	// Spawn deadly spikes periodically (less frequent now that we have permanent ones)
	spikeSpawnTimer++;
	if (spikeSpawnTimer > 800 + Math.random() * 400) {
		spawnTopSpikes();
		spawnBottomSpikes();
		spikeSpawnTimer = 0;
	}
	// Update and clean up clouds
	for (var c = clouds.length - 1; c >= 0; c--) {
		var cloud = clouds[c];
		if (cloud.x < -400) {
			cloud.destroy();
			clouds.splice(c, 1);
		}
	}
	// Update and check obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obstacle = obstacles[i];
		if (obstacle.lastX === undefined) obstacle.lastX = obstacle.x;
		// Remove off-screen obstacles
		if (obstacle.lastX >= -100 && obstacle.x < -100) {
			obstacle.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Check collision with dragon
		if (dragon.intersects(obstacle)) {
			// Enhanced collision effect - shake dragon before game over
			tween(dragon, {
				x: dragon.x + 20
			}, {
				duration: 50,
				onFinish: function onFinish() {
					tween(dragon, {
						x: dragon.x - 40
					}, {
						duration: 50,
						onFinish: function onFinish() {
							tween(dragon, {
								x: dragon.x + 20
							}, {
								duration: 50,
								onFinish: function onFinish() {
									// Flash screen and show game over
									LK.effects.flashScreen(0xff0000, 1000);
									LK.showGameOver();
								}
							});
						}
					});
				}
			});
			return;
		}
		// Score for passing obstacle - 1 point per obstacle
		if (!obstacle.passed && obstacle.x < dragon.x - 60) {
			obstacle.passed = true;
			LK.setScore(LK.getScore() + 1);
			speedMultiplier += 0.01;
			scoreTxt.setText('Score: ' + LK.getScore());
			// Format speed display to show clean decimals (1.1, 1.2, etc)
			var displaySpeed = Math.round(speedMultiplier * 100) / 100;
			speedTxt.setText(displaySpeed.toFixed(1) + 'x');
		}
		obstacle.lastX = obstacle.x;
	}
	// Update and check scrolls
	for (var k = scrolls.length - 1; k >= 0; k--) {
		var scroll = scrolls[k];
		if (scroll.lastX === undefined) scroll.lastX = scroll.x;
		// Remove off-screen scrolls
		if (scroll.lastX >= -50 && scroll.x < -50) {
			scroll.destroy();
			scrolls.splice(k, 1);
			continue;
		}
		// Check collection
		if (!scroll.collected && dragon.intersects(scroll)) {
			scroll.collected = true;
			LK.setScore(LK.getScore() + 100);
			scoreTxt.setText('Score: ' + LK.getScore());
			LK.getSound('collect').play();
			// Scroll collection effect
			tween(scroll, {
				alpha: 0,
				scaleX: 1.5,
				scaleY: 1.5
			}, {
				duration: 400,
				onFinish: function onFinish() {
					scroll.destroy();
				}
			});
			scrolls.splice(k, 1);
			continue;
		}
		scroll.lastX = scroll.x;
	}
	// Update and clean up top spikes
	for (var s1 = topSpikes.length - 1; s1 >= 0; s1--) {
		var topSpike = topSpikes[s1];
		if (topSpike.x < -100) {
			topSpike.destroy();
			topSpikes.splice(s1, 1);
			continue;
		}
		// Check deadly collision with dragon
		if (dragon.intersects(topSpike)) {
			// Enhanced death effect - make dragon flash red
			tween(dragon, {
				tint: 0xff0000,
				scaleX: 1.3,
				scaleY: 1.3
			}, {
				duration: 200,
				onFinish: function onFinish() {
					LK.effects.flashScreen(0xff0000, 1500);
					LK.showGameOver();
				}
			});
			return;
		}
	}
	// Update and clean up bottom spikes
	for (var s2 = bottomSpikes.length - 1; s2 >= 0; s2--) {
		var bottomSpike = bottomSpikes[s2];
		if (bottomSpike.x < -100) {
			bottomSpike.destroy();
			bottomSpikes.splice(s2, 1);
			continue;
		}
		// Check deadly collision with dragon
		if (dragon.intersects(bottomSpike)) {
			// Enhanced death effect - make dragon flash red
			tween(dragon, {
				tint: 0xff0000,
				scaleX: 1.3,
				scaleY: 1.3
			}, {
				duration: 200,
				onFinish: function onFinish() {
					LK.effects.flashScreen(0xff0000, 1500);
					LK.showGameOver();
				}
			});
			return;
		}
	}
	// Win condition - survive long enough
	if (LK.getScore() >= 2000) {
		LK.showYouWin();
	}
};
// Start background music
LK.playMusic('flight');