You can delete your Trace account and all its data at any time.
If you no longer have the game installed, email vd@frugalfounder.in with the subject "Delete my Trace account" and your player ID if you have it (Settings → Account → Player ID). We delete the account within 30 days and confirm by email.
Nothing is kept afterwards, except where the law requires it. Purchases stay with your App Store or Google Play account, so Remove Ads can still be restored. Continues you had are lost.
To keep your account but start over, use Clear progress in the same place instead.