How can I restart an app game from the beginning [duplicate]

Deleting the game from iOS devices usually removes the game stored data, unless, those data are stored in iCloud. Here are the steps to delete saved games data in iCloud.

1. Make sure you’ve deleted the games you want to reset. Some of those games will push the local saved data to iCloud even if you’ve deleted the data in iCloud.
2. Access those saved games data in Setting > iCloud > Storage & Backup > Manage Storage.
3. Select Show All to view all the saved data. You’ll see non-games app in this location too because it shows all your iCloud storage.
4. Tap on the games you want to reset.
5. Tap Edit at the top right.
6. Tap Delete All to delete the saved games data.