In order to play Word Rally against your friends, you first have to add your friends in Game Center.
Open Game Center.
At the bottom of the screen click Requests.
Click Add Friends.
In the To: field type in your friend’s email address or exact Game Center Nickname.
Feel free to add some information in the email box so they know you want them to join you on Game Center in order to play Word Rally together.
Your friend will receive an email asking them to accept the Friend Request in Game Center.
While you wait, play some Word Jewels! 🙂 Once your friend has accepted the invitation go back into Word Rally.
Once you are friends in Game Center, you can invite them to a game in Word Rally.
Click the blue game pieces button.
Click the + button in the upper right corner of the window.
Click the Invite Friend button. This will bring up a list of your Game Center friends.
Tap the friend(s) you want to invite to your game. You can play with up to 3 other people in one game.
Click Next. (Optional) Add text to the invitation.
Click Send.
Click Play Now.
Your game has begun!
Click here to download these step by step Word Rally instructions with screenshots.