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Something wrong, or just want to ask? Write to marbelscreator@gmail.com and say which device and which iOS version you are on — that is usually enough to find the problem.
Progress is saved on the device, not to an account, so deleting the app deletes it and a new phone starts fresh. There is no way to recover it from our side, because we never had a copy.
Open the shop and use Restore Purchases. That asks Apple what this Apple Account owns and re-grants it. If it still does not appear, email us with the date of the purchase.
Refunds are handled by Apple, not by us. Go to reportaproblem.apple.com and sign in with your Apple Account.
Answer Ask App Not to Track when iOS asks, or change it later in Settings → Privacy & Security → Tracking. The adverts are then chosen at random instead of for you, and nothing else about the game changes. In Europe and the UK there is also an Ad Preferences button in the game's own Settings panel, which reopens the consent form.
See the privacy policy. The short version: everything the game saves about you stays on your device, and the only thing that leaves it is what Google needs to choose the adverts.