Hi there! I'm John Nguyen, and I'm here to help you with the issue you're experiencing with the Jigsort Puzzles app being frozen on your iPhone.

To troubleshoot this, let's follow a few simple steps:

1. Force Close the App:
- Swipe up from the bottom of your screen (or double-tap the Home button if your iPhone has one) to access the app switcher.
- Look for the Jigsort Puzzles app, and swipe it up off the screen to close it.

2. Restart Your iPhone:
- Press and hold the side button and either volume button until the slider appears.
- Slide to power off your iPhone, then wait a few moments and turn it back on.

3. Check for Updates:
- Once your device is back on, open the App Store and check if there’s an update available for Jigsort Puzzles. Make sure all your apps and iOS are up to date.

4. Free Up Space:
- Make sure that you have enough available storage on your device. Navigate to Settings > General > iPhone Storage, and check if you need to free up some space.

Try these steps and let me know if the issue persists or if you’re able to resolve it. Are you satisfied with the solution I provided?