===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,208 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// Obstacle class (tall block)
+var Obstacle = Container.expand(function () {
+	var self = Container.call(this);
+	var obsSprite = self.attachAsset('obstacle', {
+		anchorX: 0.5,
+		anchorY: 1
+	});
+	self.speed = 22;
+	self.update = function () {
+		self.x -= self.speed;
+	};
+	return self;
+});
+// Player class
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	var playerSprite = self.attachAsset('player', {
+		anchorX: 0.5,
+		anchorY: 1
+	});
+	// Physics
+	self.vy = 0;
+	self.isJumping = false;
+	self.gravity = 2.2;
+	self.jumpStrength = -48;
+	self.groundY = 0; // Set after ground is created
+	// Update method
+	self.update = function () {
+		// Apply gravity
+		self.vy += self.gravity;
+		self.y += self.vy;
+		// Ground collision
+		if (self.y > self.groundY) {
+			self.y = self.groundY;
+			self.vy = 0;
+			self.isJumping = false;
+		}
+	};
+	// Jump method
+	self.jump = function () {
+		if (!self.isJumping && self.y >= self.groundY) {
+			self.vy = self.jumpStrength;
+			self.isJumping = true;
+		}
+	};
+	return self;
+});
+// Spike class (obstacle)
+var Spike = Container.expand(function () {
+	var self = Container.call(this);
+	var spikeSprite = self.attachAsset('spike', {
+		anchorX: 0.5,
+		anchorY: 1
+	});
+	self.speed = 22; // Moves left
+	self.update = function () {
+		self.x -= self.speed;
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x222831
+});
+
+/**** 
+* Game Code
+****/ 
+// Obstacle: purple rectangle
+// Spike: red triangle (approximate with a tall, thin box for MVP)
+// Ground: gray rectangle
+// Player: blue square
+// Constants
+var GROUND_HEIGHT = 120;
+var PLAYER_SIZE = 120;
+var PLAYER_START_X = 400;
+var OBSTACLE_MIN_GAP = 600;
+var OBSTACLE_MAX_GAP = 1100;
+var OBSTACLE_TYPES = ['spike', 'obstacle'];
+var OBSTACLE_Y = 2732 - GROUND_HEIGHT;
+// Game state
+var player;
+var ground;
+var obstacles = [];
+var score = 0;
+var scoreTxt;
+var lastObstacleX = 0;
+var isGameOver = false;
+// Create ground
+ground = LK.getAsset('ground', {
+	anchorX: 0,
+	anchorY: 1,
+	x: 0,
+	y: 2732
+});
+game.addChild(ground);
+// Create player
+player = new Player();
+player.x = PLAYER_START_X;
+player.groundY = 2732 - GROUND_HEIGHT;
+player.y = player.groundY;
+game.addChild(player);
+// Score text
+scoreTxt = new Text2('0', {
+	size: 120,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// Helper: spawn obstacle
+function spawnObstacle() {
+	// Randomly pick type
+	var type = OBSTACLE_TYPES[Math.floor(Math.random() * OBSTACLE_TYPES.length)];
+	var obs;
+	if (type === 'spike') {
+		obs = new Spike();
+		obs.x = 2048 + 100;
+		obs.y = OBSTACLE_Y;
+	} else {
+		obs = new Obstacle();
+		obs.x = 2048 + 100;
+		obs.y = OBSTACLE_Y;
+	}
+	obstacles.push(obs);
+	game.addChild(obs);
+	lastObstacleX = obs.x;
+}
+// Helper: reset game state
+function resetGame() {
+	// Remove obstacles
+	for (var i = 0; i < obstacles.length; i++) {
+		obstacles[i].destroy();
+	}
+	obstacles = [];
+	// Reset player
+	player.x = PLAYER_START_X;
+	player.y = player.groundY;
+	player.vy = 0;
+	player.isJumping = false;
+	// Reset score
+	score = 0;
+	scoreTxt.setText(score);
+	lastObstacleX = 1200;
+	isGameOver = false;
+}
+// Touch/click to jump
+game.down = function (x, y, obj) {
+	if (isGameOver) return;
+	player.jump();
+};
+// Main update loop
+game.update = function () {
+	if (isGameOver) return;
+	// Update player
+	player.update();
+	// Update obstacles
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obs = obstacles[i];
+		obs.update();
+		// Remove if off screen
+		if (obs.x < -200) {
+			obs.destroy();
+			obstacles.splice(i, 1);
+			continue;
+		}
+		// Collision detection
+		if (player.intersects(obs)) {
+			// Flash screen and game over
+			LK.effects.flashScreen(0xff0000, 800);
+			isGameOver = true;
+			LK.setTimeout(function () {
+				LK.showGameOver();
+			}, 600);
+			return;
+		}
+	}
+	// Score: increase as player passes obstacles
+	for (var j = 0; j < obstacles.length; j++) {
+		var o = obstacles[j];
+		if (!o.passed && o.x + 60 < player.x) {
+			o.passed = true;
+			score += 1;
+			scoreTxt.setText(score);
+		}
+	}
+	// Spawn new obstacles
+	if (obstacles.length === 0 || 2048 - lastObstacleX > OBSTACLE_MIN_GAP + Math.floor(Math.random() * (OBSTACLE_MAX_GAP - OBSTACLE_MIN_GAP))) {
+		spawnObstacle();
+	}
+};
+// Reset game on game over
+LK.on('gameover', function () {
+	resetGame();
+});
+// Initial obstacle
+lastObstacleX = 1200;
+spawnObstacle();
\ No newline at end of file