===================================================================
--- original.js
+++ change.js
@@ -162,14 +162,13 @@
 			} else {
 				//self.x += 4 - 8 * Math.random();
 				self.x += globalSpeedPerLine[self.lineIndex] * 0.05 * Math.random();
 			}
-			// Auto jump hurdles in obstaclesLine1
+			// Auto jump hurdles in obstacles[self.lineIndex]
 			if (self.isOnGround) {
-				for (var i = 0; i < obstaclesLine1.length; i++) {
-					var distance = obstaclesLine1[i].x - self.x;
+				for (var i = 0; i < obstacles[self.lineIndex].length; i++) {
+					var distance = obstacles[self.lineIndex][i].x - self.x;
 					if (distance > 0 && distance <= 200) {
-						//Math.max(50, (300 - globalSpeedPerLine[0]*2))) {//self.lineIndex
 						self.jump();
 						break; // Jump once for the closest obstacle within range
 					}
 				}
@@ -336,12 +335,13 @@
 var gameState = GAME_STATE.INIT;
 var athlete;
 var opponents = [];
 var numberOfOpponents = 3; // Adjust based on the actual number of opponents in the game
-var obstacles = [[], []]; // 2D array for obstacles on different lines
 var groundLevel = 2732 - 200; // Ground level set 200px from the bottom
 var linesGroundLevels = [groundLevel - 200, groundLevel - 420, groundLevel - 640]; // Ground level set 200px from the bottom
 var groundLevelLine1 = 2732 - 200; // Ground level set 200px from the bottom
+var numberOfLines = 1 + numberOfOpponents;
+var obstacles = [[], []];
 var obstacleSpawnTicker = 0;
 var obstacleSpawnRate = 180; // Spawn an obstacle every 2 seconds
 var obstacleJustPassed = false;
 var track;
@@ -497,25 +497,21 @@
 	// Spawn obstacles
 	obstacleSpawnTicker += athlete.isFalling ? 0 : 1;
 	if (obstacleSpawnTicker >= obstacleSpawnRate) {
 		obstacleSpawnTicker = 0;
-		// Line 1
-		var newObstacle = new Obstacle(0);
-		newObstacle.x = 2048; // Start from the right edge
-		newObstacle.y = groundLevel + 200;
-		obstacles.push(newObstacle);
-		game.addChild(newObstacle);
-		// Line 2
-		var newObstacle2 = new Obstacle(1);
-		newObstacle2.x = 2048 + 100; // Start from the right edge
-		newObstacle2.y = groundLevel + 200 - 220;
-		obstaclesLine1.push(newObstacle2);
-		game.addChild(newObstacle2);
+		for (var line = 0; line < numberOfLines; line++) {
+			obstacles[line] = obstacles[line] || [];
+			var newObstacle = new Obstacle(line);
+			newObstacle.x = 2048; // Start from the right edge      
+			newObstacle.y = groundLevel + 200 - 220 * line;
+			obstacles[line].push(newObstacle);
+			game.addChild(newObstacle);
+		}
 	}
 }
 function updateObstacles() {
 	// Update obstacles
-	for (var line = 0; line < obstacles.length; line++) {
+	for (var line = 0; line < numberOfLines; line++) {
 		for (var i = obstacles[line].length - 1; i >= 0; i--) {
 			obstacles[line][i].update();
 			// Remove obstacle if it moves off-screen and increase global speed
 			if (obstacles[line][i].x < -100) {
@@ -533,28 +529,30 @@
 		obstacleJustPassed = false;
 		LK.setScore(LK.getScore() + 1); // Add 1 to score for each hurdle passed only if not falling
 		scoreTxt.setText(LK.getScore()); // Update score text with prefix
 		// Increase global speed after each obstacle passed and add 1 to score only if not falling
-		globalSpeedPerLine[0] -= globalSpeedIncreaseStep; // Increase the speed
-		globalSpeedPerLine[1] -= globalSpeedIncreaseStep; // Increase the speed
+		for (var line = 0; line < numberOfLines; line++) {
+			globalSpeedPerLine[line] += globalSpeedIncreaseStep;
+		}
 	}
 }
 function checkForCollisions() {
-	for (var line = 0; line < obstacles.length; line++) {
+	for (var line = 0; line < numberOfLines; line++) {
 		for (var i = 0; i < obstacles[line].length; i++) {
 			var obstacle = obstacles[line][i];
-			if (athlete.lineIndex === line && athlete.intersects(obstacle.centralRod)) {
-				athlete.isFalling = true;
-				athlete.isOnGround = false;
-				athlete.fallAnim(); // Call fall animation before game over
-			}
-			opponents.forEach(function (opponent) {
-				if (opponent.lineIndex === line && opponent.intersects(obstacle.centralRod)) {
-					opponent.isFalling = true;
-					opponent.isOnGround = false;
-					opponent.fallAnim(); // Call fall animation before game over
+			if (line === 0) {
+				if (athlete.intersects(obstacle.centralRod)) {
+					athlete.isFalling = true;
+					athlete.isOnGround = false;
+					athlete.fallAnim(); // Call fall animation before game over
 				}
-			});
+			} else {
+				if (opponents[line - 1].intersects(obstacle.centralRod)) {
+					opponents[line - 1].isFalling = true;
+					opponents[line - 1].isOnGround = false;
+					opponents[line - 1].fallAnim(); // Call fall animation before game over
+				}
+			}
 		}
 	}
 	handleFallEvent();
 }