Note: If you migrate your existing iPhone data to your new iPhone, at the Getting Started step (when first booting a new iPhone) you will have Lemmings automatically downloaded. Your progress will be saved and you can pick up wherever you left off initially.

Otherwise, you can transfer your save manually:

1. You must have played Lemmings and have made some progress in the game. When playing on your old device, you will see a "Save your progress" pop-up, which tells you to log in to Game Center. You will also see the option to Log In to Game Center under Settings.

2. You need to Log in to Game Center to save progress. If you don’t have a Game Center profile yet, your iPhone will guide you through making one on the spot.

3. Download Lemmings from the App Store on the new iPhone.

4. Play through the four tutorial levels.

5. Once finished, go to the Settings menu and select "Sign in to Game Center" at the bottom.

6. The game will now present you with the choice to import your Game Center save file or to keep the local save. Details are provided for both options.

7. If you pick the Game Center save file, this save will now be imported and you’ll resume playing Lemmings from where you originally left off on your old iPhone device.