===================================================================
--- original.js
+++ change.js
@@ -1,6 +1,228 @@
-/****
+/**** 
+* Plugins
+****/ 
+var tween = LK.import("@upit/tween.v1");
+
+/**** 
+* Classes
+****/ 
+// Obstacle class: spikes or blocks
+var Obstacle = Container.expand(function () {
+	var self = Container.call(this);
+	// Randomly choose obstacle type: spike or block
+	var type = Math.random() < 0.5 ? 'spike' : 'block';
+	if (type === 'spike') {
+		// Spike: triangle (use box asset, scale to triangle shape)
+		var spikeAsset = self.attachAsset('spike', {
+			anchorX: 0.5,
+			anchorY: 1
+		});
+		// width: 80, height: 120, color: 0xff4444, shape: 'box'
+		// We'll visually "fake" a triangle by scaling Y and X
+		spikeAsset.scaleX = 1;
+		spikeAsset.scaleY = 1.2;
+	} else {
+		// Block: rectangle
+		var blockAsset = self.attachAsset('obstacleBlock', {
+			anchorX: 0.5,
+			anchorY: 1
+		});
+		// width: 120, height: 120, color: 0x888888, shape: 'box'
+	}
+	self.type = type;
+	// Update method: move left
+	self.update = function () {
+		self.x -= obstacleSpeed;
+	};
+	return self;
+});
+// Player class: geometric box that auto-runs and jumps
+var Player = Container.expand(function () {
+	var self = Container.call(this);
+	// Attach player asset (box)
+	var playerAsset = self.attachAsset('playerBox', {
+		anchorX: 0.5,
+		anchorY: 1
+	});
+	// Physics properties
+	self.vy = 0; // vertical velocity
+	self.isJumping = false;
+	self.grounded = true;
+	// Constants
+	self.jumpVelocity = -48; // negative is up
+	self.gravity = 5; // gravity per frame
+	// Set initial size and color
+	// (Asset will be created automatically)
+	// width: 120, height: 120, color: 0x2eccff
+	// Update method called every tick
+	self.update = function () {
+		// Apply gravity
+		if (!self.grounded) {
+			self.vy += self.gravity;
+			self.y += self.vy;
+			// Check for landing on ground
+			if (self.y >= groundY) {
+				self.y = groundY;
+				self.vy = 0;
+				self.grounded = true;
+				self.isJumping = false;
+			}
+		}
+	};
+	// Jump method
+	self.jump = function () {
+		if (self.grounded && !self.isJumping) {
+			self.vy = self.jumpVelocity;
+			self.grounded = false;
+			self.isJumping = true;
+		}
+	};
+	return self;
+});
+
+/**** 
 * Initialize Game
-****/
+****/ 
 var game = new LK.Game({
-	backgroundColor: 0x000000
-});
\ No newline at end of file
+	backgroundColor: 0x181c2c
+});
+
+/**** 
+* Game Code
+****/ 
+// Tween plugin for jump and obstacle animations
+// --- Constants ---
+var groundY = 2200; // Y position of ground (player stands here)
+var playerStartX = 500;
+var playerStartY = groundY;
+var obstacleStartX = 2200; // Obstacles spawn off-screen right
+var obstacleSpeed = 28; // How fast obstacles move left
+var minObstacleGap = 500; // Minimum distance between obstacles
+var maxObstacleGap = 900; // Maximum distance between obstacles
+// --- Asset Initialization (auto by LK, but for clarity) ---
+// --- Game State ---
+var player;
+var obstacles = [];
+var score = 0;
+var scoreTxt;
+var lastObstacleX = 0;
+var gameStarted = false;
+// --- Ground ---
+var ground = LK.getAsset('ground', {
+	anchorX: 0,
+	anchorY: 0,
+	x: 0,
+	y: groundY + 1
+});
+game.addChild(ground);
+// --- Player ---
+player = new Player();
+player.x = playerStartX;
+player.y = playerStartY;
+game.addChild(player);
+// --- Score Display ---
+scoreTxt = new Text2('0', {
+	size: 120,
+	fill: 0xFFFFFF
+});
+scoreTxt.anchor.set(0.5, 0);
+LK.gui.top.addChild(scoreTxt);
+// --- Start State ---
+resetGame();
+function resetGame() {
+	// Remove all obstacles
+	for (var i = 0; i < obstacles.length; i++) {
+		obstacles[i].destroy();
+	}
+	obstacles = [];
+	// Reset player
+	player.x = playerStartX;
+	player.y = playerStartY;
+	player.vy = 0;
+	player.grounded = true;
+	player.isJumping = false;
+	// Reset score
+	score = 0;
+	LK.setScore(0);
+	scoreTxt.setText('0');
+	// Reset obstacle spawn
+	lastObstacleX = 1600;
+	// Spawn initial obstacles
+	for (var i = 0; i < 3; i++) {
+		spawnObstacle(lastObstacleX + 800 * i);
+	}
+	gameStarted = true;
+}
+// --- Obstacle Spawning ---
+function spawnObstacle(x) {
+	var obs = new Obstacle();
+	obs.x = x;
+	obs.y = groundY;
+	obstacles.push(obs);
+	game.addChild(obs);
+	lastObstacleX = x;
+}
+// --- Collision Detection ---
+function checkCollision(a, b) {
+	// Simple AABB collision
+	var ab = a.getBounds();
+	var bb = b.getBounds();
+	return ab.x < bb.x + bb.width && ab.x + ab.width > bb.x && ab.y < bb.y + bb.height && ab.y + ab.height > bb.y;
+}
+// --- Game Update Loop ---
+game.update = function () {
+	if (!gameStarted) return;
+	// Update player
+	player.update();
+	// Update obstacles
+	for (var i = obstacles.length - 1; i >= 0; i--) {
+		var obs = obstacles[i];
+		obs.update();
+		// Remove obstacles that have gone off screen
+		if (obs.x < -200) {
+			obs.destroy();
+			obstacles.splice(i, 1);
+			continue;
+		}
+		// Collision with player
+		if (checkCollision(player, obs)) {
+			// Flash screen and show game over
+			LK.effects.flashScreen(0xff0000, 800);
+			LK.showGameOver();
+			gameStarted = false;
+			return;
+		}
+	}
+	// Spawn new obstacles if needed
+	if (obstacles.length === 0 || obstacles.length > 0 && obstacles[obstacles.length - 1].x < 2048 - minObstacleGap) {
+		var gap = minObstacleGap + Math.floor(Math.random() * (maxObstacleGap - minObstacleGap));
+		spawnObstacle(2048 + gap);
+	}
+	// Score: increase as player passes obstacles
+	for (var j = 0; j < obstacles.length; j++) {
+		var obs2 = obstacles[j];
+		if (!obs2.passed && obs2.x + 60 < player.x) {
+			obs2.passed = true;
+			score += 1;
+			LK.setScore(score);
+			scoreTxt.setText(score + '');
+		}
+	}
+};
+// --- Input: Tap to Jump ---
+game.down = function (x, y, obj) {
+	if (!gameStarted) return;
+	player.jump();
+};
+// --- Reset on Game Over ---
+LK.on('gameover', function () {
+	// Wait a short moment before reset to allow flash
+	LK.setTimeout(function () {
+		resetGame();
+	}, 400);
+});
+// --- Prevent drag/scroll on mobile (handled by LK) ---
+// --- Center score text ---
+scoreTxt.setText('0');
+scoreTxt.anchor.set(0.5, 0);
+// --- End of file ---
\ No newline at end of file