I followed this
1. As in the requirements, please download a file manager if you do not already have one. I recommend Filza as it shows the application names by default.
2. After installing Filza or your preferred file manager, open it up and navigate to: /var/mobile/Containers/Data/Application/SSG3/Library/SyncedPreferences/
3. Once you get in there you'll notice one lonely plist file. Simply open that up with the default property list editor.
4. Now you want to tap where it says 'Root - Dictionary[3]', then 'Values - Dictionary[17]', and then tap on 'LEVEL - Dictionary[2]'.
5. You'll notice there's yet another value in here. It should display whatever your current level is. To edit it just tap on the (i) icon which means information beside the value on the right side. Then you should know how to edit text fields. And that's it!
6. Save the file and then press done!
Changed my level to 19 and there was no save button or anything. I click return and it goes back to normal
Anyone know why?