===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,218 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+var facekit = LK.import("@upit/facekit.v1");
+
+/**** 
+* Classes
+****/ 
+// Player character controlled by face
+var FaceChar = Container.expand(function () {
+	var self = Container.call(this);
+	var _char = self.attachAsset('faceChar', {
+		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;
+});
+// Obstacle class
+var Obstacle = Container.expand(function () {
+	var self = Container.call(this);
+	var obs = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	// For possible future animation
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+// Point collectible class
+var PointItem = Container.expand(function () {
+	var self = Container.call(this);
+	var pt = self.attachAsset('point', {
+		anchorX: 0.5,
+		anchorY: 0.5
+	});
+	self.update = function () {
+		self.y += self.speed;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
+	backgroundColor: 0x181c2c
+});
+
+/**** 
+* Game Code
+****/ 
+/*
+We use simple shapes for the character, obstacles, and points.
+- character: ellipse, bright color
+- obstacle: box, dark color
+- point: ellipse, gold color
+*/
+// Game constants
+var GAME_WIDTH = 2048;
+var GAME_HEIGHT = 2732;
+var CHAR_START_X = GAME_WIDTH / 2;
+var CHAR_START_Y = GAME_HEIGHT * 0.8;
+var OBSTACLE_MIN_X = 180;
+var OBSTACLE_MAX_X = GAME_WIDTH - 180;
+var OBSTACLE_MIN_GAP = 400;
+var OBSTACLE_MAX_GAP = 900;
+var OBSTACLE_MIN_SPEED = 12;
+var OBSTACLE_MAX_SPEED = 32;
+var POINT_MIN_GAP = 600;
+var POINT_MAX_GAP = 1400;
+var POINT_SPEED_FACTOR = 1.0;
+// Game state
+var faceChar;
+var obstacles = [];
+var points = [];
+var score = 0;
+var scoreTxt;
+var lastObstacleY = 0;
+var lastPointY = 0;
+var gameSpeed = 1.0;
+var ticksSinceStart = 0;
+var isGameOver = false;
+// Score display
+scoreTxt = new Text2('0', {
+	size: 140,
+	fill: "#fff"
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Create player character
+faceChar = new FaceChar();
+game.addChild(faceChar);
+faceChar.x = CHAR_START_X;
+faceChar.y = CHAR_START_Y;
+// Helper: Clamp value
+function clamp(val, min, max) {
+	return Math.max(min, Math.min(max, val));
+}
+// Helper: Generate random integer in [min, max]
+function randInt(min, max) {
+	return min + Math.floor(Math.random() * (max - min + 1));
+}
+// Helper: Place new obstacle at top
+function spawnObstacle() {
+	var obs = new Obstacle();
+	obs.x = randInt(OBSTACLE_MIN_X, OBSTACLE_MAX_X);
+	obs.y = -100;
+	obs.speed = OBSTACLE_MIN_SPEED + (OBSTACLE_MAX_SPEED - OBSTACLE_MIN_SPEED) * Math.min(1, gameSpeed / 3);
+	obstacles.push(obs);
+	game.addChild(obs);
+}
+// Helper: Place new point at top
+function spawnPoint() {
+	var pt = new PointItem();
+	pt.x = randInt(OBSTACLE_MIN_X, OBSTACLE_MAX_X);
+	pt.y = -80;
+	pt.speed = (OBSTACLE_MIN_SPEED + (OBSTACLE_MAX_SPEED - OBSTACLE_MIN_SPEED) * Math.min(1, gameSpeed / 3)) * POINT_SPEED_FACTOR;
+	points.push(pt);
+	game.addChild(pt);
+}
+// Main update loop
+game.update = function () {
+	if (isGameOver) return;
+	ticksSinceStart++;
+	// Increase speed over time
+	if (ticksSinceStart % 120 === 0) {
+		gameSpeed += 0.08;
+	}
+	// Face tracking: Use mouth center if available, else nose tip
+	var fx = facekit.mouthCenter && facekit.mouthCenter.x ? facekit.mouthCenter.x : facekit.noseTip && facekit.noseTip.x ? facekit.noseTip.x : CHAR_START_X;
+	var fy = facekit.mouthCenter && facekit.mouthCenter.y ? facekit.mouthCenter.y : facekit.noseTip && facekit.noseTip.y ? facekit.noseTip.y : CHAR_START_Y;
+	// Clamp to game area, avoid top 100px (menu)
+	faceChar.x = clamp(fx, 100 + faceChar.width / 2, GAME_WIDTH - faceChar.width / 2);
+	faceChar.y = clamp(fy, 200 + faceChar.height / 2, GAME_HEIGHT - faceChar.height / 2);
+	// Spawn obstacles
+	if (obstacles.length === 0 || obstacles[obstacles.length - 1].y > randInt(OBSTACLE_MIN_GAP, OBSTACLE_MAX_GAP)) {
+		spawnObstacle();
+	}
+	// Spawn points
+	if (points.length === 0 || points[points.length - 1].y > randInt(POINT_MIN_GAP, POINT_MAX_GAP)) {
+		spawnPoint();
+	}
+	// Update obstacles
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obs = obstacles[i];
+		obs.y += obs.speed * gameSpeed;
+		if (obs.y > GAME_HEIGHT + 100) {
+			obs.destroy();
+			obstacles.splice(i, 1);
+			continue;
+		}
+		// Collision with player
+		if (faceChar.intersects(obs)) {
+			isGameOver = true;
+			faceChar.flash();
+			LK.effects.flashScreen(0xff2222, 800);
+			LK.showGameOver();
+			return;
+		}
+	}
+	// Update points
+	for (var j = points.length - 1; j >= 0; j--) {
+		var pt = points[j];
+		pt.y += pt.speed * gameSpeed;
+		if (pt.y > GAME_HEIGHT + 80) {
+			pt.destroy();
+			points.splice(j, 1);
+			continue;
+		}
+		// Collect point
+		if (faceChar.intersects(pt)) {
+			score += 1;
+			scoreTxt.setText(score);
+			// Flash effect
+			LK.effects.flashObject(faceChar, 0xffd700, 200);
+			pt.destroy();
+			points.splice(j, 1);
+			continue;
+		}
+	}
+};
+// Reset state on game restart
+game.on('reset', function () {
+	// Remove all obstacles and points
+	for (var i = 0; i < obstacles.length; i++) {
+		obstacles[i].destroy();
+	}
+	for (var j = 0; j < points.length; j++) {
+		points[j].destroy();
+	}
+	obstacles = [];
+	points = [];
+	score = 0;
+	scoreTxt.setText(score);
+	faceChar.x = CHAR_START_X;
+	faceChar.y = CHAR_START_Y;
+	gameSpeed = 1.0;
+	ticksSinceStart = 0;
+	isGameOver = false;
 });
\ No newline at end of file