You are always in control of your KidSafe Play account. You can permanently delete your account and everything we store about you — including any data we received from Google or Facebook sign-in (your name, email and profile picture) and your approved-games list.
If you signed in with Facebook, you can also remove KidSafe Play from your Facebook settings: Settings & privacy → Settings → Apps and Websites. That revokes our access; email us as above to also erase any data already stored.