Arrowslide has no accounts, so there is nothing to sign in to and nothing to close. Here is where each kind of data lives and how to remove it.
Progress on your phone
Your levels, coins, boosters, badges and streaks are stored on your device. Uninstall the app, or open Android Settings > Apps > Arrowslide > Storage > Clear storage, and they are deleted.
Cloud save
If you are signed in to Google Play Games, a copy of your progress is kept in your Play Games saved games so it survives a new phone. To delete it, open the Google Play Games app's settings and delete Arrowslide's data under "Delete Play Games account & data".
Analytics and crash reports
Firebase keeps gameplay events and crash reports under a random app instance identifier, not your name or email. Clearing the app's storage or uninstalling starts a new identifier. To have the existing data erased, email support@arrowslide.com with the subject "Delete my data"; we will delete it within 30 days.
Advertising data
Ad partners hold data linked to your device's advertising ID. Delete or reset that ID in Android Settings > Google > Ads, and in the European Economic Area, UK and Switzerland you can withdraw ad consent in the app under Settings > Privacy choices. See the privacy policy for the partners involved.