===================================================================
--- original.js
+++ change.js
@@ -106,19 +106,36 @@
 			bullets.splice(i, 1);
 		}
 	}
 });
-// Simple touch controls to change plane directions
+// Flags to track if the screen is being touched
+var isTouchingLeft = false;
+var isTouchingRight = false;
+// Change plane direction when the screen is touched
 game.on('down', function (obj) {
 	var pos = obj.event.getLocalPosition(game);
-	// If touch is on the left half of the screen, change plane1 direction
+	// If touch is on the left half of the screen, set isTouchingLeft to true
 	if (pos.x < 1024) {
+		isTouchingLeft = true;
+	} else {
+		// If touch is on the right half, set isTouchingRight to true
+		isTouchingRight = true;
+	}
+});
+// Stop changing plane direction when the screen is no longer being touched
+game.on('up', function (obj) {
+	isTouchingLeft = false;
+	isTouchingRight = false;
+});
+// In the game tick, change plane direction while the screen is being touched
+LK.on('tick', function () {
+	if (isTouchingLeft) {
 		var angle = Math.atan2(plane1.speedY, plane1.speedX);
 		angle += Math.PI / 12; // Add 15 degrees (in radians)
 		plane1.speedX = Math.cos(angle) * 5;
 		plane1.speedY = Math.sin(angle) * 5;
-	} else {
-		// If touch is on the right half, change plane2 direction
+	}
+	if (isTouchingRight) {
 		var angle = Math.atan2(plane2.speedY, plane2.speedX);
 		angle += Math.PI / 12; // Add 15 degrees (in radians)
 		plane2.speedX = Math.cos(angle) * 5;
 		plane2.speedY = Math.sin(angle) * 5;