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

/**** 
* Classes
****/ 
// Fast obstacle (normal size, very fast)
var FastObstacle = Container.expand(function () {
	var self = Container.call(this);
	// Tint to distinguish
	var asset = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	asset.tint = 0x3498db;
	return self;
});
// Large obstacle (slower, bigger)
var LargeObstacle = Container.expand(function () {
	var self = Container.call(this);
	// Override asset
	var asset = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 1.5,
		scaleY: 1.5
	});
	return self;
});
// Obstacle base class
var Obstacle = Container.expand(function () {
	var self = Container.call(this);
	// Default asset, can be overridden by subclasses
	var obstacleAsset = self.attachAsset('obstacle', {
		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;
});
// Player class
var Player = Container.expand(function () {
	var self = Container.call(this);
	var playerAsset = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	// No update needed; position is set by facekit in main game loop
	return self;
});
// Small obstacle (faster, smaller)
var SmallObstacle = Container.expand(function () {
	var self = Container.call(this);
	// Override asset
	var asset = self.attachAsset('obstacle', {
		anchorX: 0.5,
		anchorY: 0.5,
		scaleX: 0.7,
		scaleY: 0.7
	});
	return self;
});

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

/**** 
* Game Code
****/ 
// Obstacle: red box
// Player avatar: green ellipse
// Score display
var scoreTxt = new Text2('0', {
	size: 120,
	fill: 0xFFFFFF
});
scoreTxt.anchor.set(0.5, 0);
LK.gui.top.addChild(scoreTxt);
// Player instance
var player = new Player();
game.addChild(player);
// Start at center
player.x = 2048 / 2;
player.y = 2732 / 2;
// Obstacles array
var obstacles = [];
// Game state
var isGameOver = false;
var lastScore = 0;
// Helper: Clamp value between min and max
function clamp(val, min, max) {
	if (val < min) return min;
	if (val > max) return max;
	return val;
}
// Helper: Spawn a new obstacle from a random edge
function spawnObstacle() {
	// Randomly choose obstacle type
	var typeRand = Math.random();
	var obs, speed;
	var x = 200 + Math.random() * (2048 - 400);
	var y = -80;
	if (typeRand < 0.2) {
		// 20% Large, slow
		obs = new LargeObstacle();
		speed = 6 + Math.random() * 2; // 6-8 px/frame
	} else if (typeRand < 0.5) {
		// 30% Small, fast
		obs = new SmallObstacle();
		speed = 12 + Math.random() * 4; // 12-16 px/frame
	} else if (typeRand < 0.7) {
		// 20% Fast, normal size, blue
		obs = new FastObstacle();
		speed = 16 + Math.random() * 4; // 16-20 px/frame
	} else {
		// 30% Normal
		obs = new Obstacle();
		speed = 8 + Math.random() * 6; // 8-14 px/frame
	}
	obs.x = x;
	obs.y = y;
	obs.vx = 0;
	obs.vy = speed;
	obstacles.push(obs);
	game.addChild(obs);
}
// Score logic
function setScore(val) {
	LK.setScore(val);
	scoreTxt.setText(val);
}
// Main update loop
game.update = function () {
	if (isGameOver) return;
	// Facekit: update player position
	// Use noseTip if available, else mouthCenter
	var fx = facekit.noseTip && facekit.noseTip.x ? facekit.noseTip.x : facekit.mouthCenter.x;
	var fy = facekit.noseTip && facekit.noseTip.y ? facekit.noseTip.y : facekit.mouthCenter.y;
	// Clamp to keep player inside screen (with margin for player size)
	var margin = player.width / 2 + 10;
	player.x = clamp(fx, margin, 2048 - margin);
	player.y = clamp(fy, margin, 2732 - margin);
	// Update obstacles
	for (var i = obstacles.length - 1; i >= 0; i--) {
		var obs = obstacles[i];
		obs.update();
		// Remove if out of bounds
		if (obs.x < -200 || obs.x > 2048 + 200 || obs.y < -200 || obs.y > 2732 + 200) {
			obs.destroy();
			obstacles.splice(i, 1);
			continue;
		}
		// Collision detection
		if (obs.intersects(player)) {
			// Game over
			isGameOver = true;
			LK.effects.flashScreen(0xff0000, 800);
			LK.showGameOver();
			return;
		}
	}
	// Score: survive longer = higher score
	if (LK.ticks % 6 === 0) {
		// ~10 times per second
		setScore(LK.getScore() + 1);
	}
	// Spawn obstacles at intervals, increase frequency over time
	var spawnInterval = 90 - Math.min(60, Math.floor(LK.getScore() / 30) * 10); // Faster as score increases
	if (LK.ticks % spawnInterval === 0) {
		spawnObstacle();
	}
};
// Reset state on new game
game.on('reset', function () {
	// Remove all obstacles
	for (var i = 0; i < obstacles.length; i++) {
		obstacles[i].destroy();
	}
	obstacles = [];
	setScore(0);
	isGameOver = false;
	// Center player
	player.x = 2048 / 2;
	player.y = 2732 / 2;
});
// Ensure player is not in top-left 100x100 area
player.x = 2048 / 2;
player.y = 2732 / 2;
if (player.x < 180) player.x = 180;
if (player.y < 180) player.y = 180;

===================================================================
--- original.js
+++ change.js
@@ -6,16 +6,39 @@
 
 /**** 
 * Classes
 ****/ 
-// Obstacle class
+// Fast obstacle (normal size, very fast)
+var FastObstacle = Container.expand(function () {
+	var self = Container.call(this);
+	// Tint to distinguish
+	var asset = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	asset.tint = 0x3498db;
+	return self;
+});
+// Large obstacle (slower, bigger)
+var LargeObstacle = Container.expand(function () {
+	var self = Container.call(this);
+	// Override asset
+	var asset = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		scaleX: 1.5,
+		scaleY: 1.5
+	});
+	return self;
+});
+// Obstacle base class
 var Obstacle = Container.expand(function () {
 	var self = Container.call(this);
+	// Default asset, can be overridden by subclasses
 	var obstacleAsset = self.attachAsset('obstacle', {
 		anchorX: 0.5,
 		anchorY: 0.5
 	});
-	// Direction and speed will be set on creation
 	self.vx = 0;
 	self.vy = 0;
 	self.update = function () {
 		self.x += self.vx;
@@ -32,8 +55,20 @@
 	});
 	// No update needed; position is set by facekit in main game loop
 	return self;
 });
+// Small obstacle (faster, smaller)
+var SmallObstacle = Container.expand(function () {
+	var self = Container.call(this);
+	// Override asset
+	var asset = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 0.5,
+		scaleX: 0.7,
+		scaleY: 0.7
+	});
+	return self;
+});
 
 /**** 
 * Initialize Game
 ****/ 
@@ -71,13 +106,30 @@
 	return val;
 }
 // Helper: Spawn a new obstacle from a random edge
 function spawnObstacle() {
-	// Always spawn from the top, fall straight down
-	var obs = new Obstacle();
-	var speed = 8 + Math.random() * 6; // 8-14 px/frame
+	// Randomly choose obstacle type
+	var typeRand = Math.random();
+	var obs, speed;
 	var x = 200 + Math.random() * (2048 - 400);
 	var y = -80;
+	if (typeRand < 0.2) {
+		// 20% Large, slow
+		obs = new LargeObstacle();
+		speed = 6 + Math.random() * 2; // 6-8 px/frame
+	} else if (typeRand < 0.5) {
+		// 30% Small, fast
+		obs = new SmallObstacle();
+		speed = 12 + Math.random() * 4; // 12-16 px/frame
+	} else if (typeRand < 0.7) {
+		// 20% Fast, normal size, blue
+		obs = new FastObstacle();
+		speed = 16 + Math.random() * 4; // 16-20 px/frame
+	} else {
+		// 30% Normal
+		obs = new Obstacle();
+		speed = 8 + Math.random() * 6; // 8-14 px/frame
+	}
 	obs.x = x;
 	obs.y = y;
 	obs.vx = 0;
 	obs.vy = speed;