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Open the upgrade screen and tap Restore. Purchases are tied to the Apple Account that bought them, so make sure you are signed in with the same one.
Open the Settings app, tap your name, then Subscriptions, and select HOOK WAR. You can change plan or cancel there. Cancelling at least 24 hours before renewal stops the next charge.
Progress is stored on your device. Deleting the app deletes your profile and coins. Purchases can always be restored, but earned progress cannot.
Drag on the left of the screen to move. Drag the hook button on the right to aim, release to throw. A hook that lands drags the enemy to your bank, where they are stranded and vulnerable. First team to 20 kills wins.