EU Puzzle stores only what is needed to run the game.
Data stored locally (your browser only)
Game settings (volume, font size) · Personal best times per difficulty · Language preference · Guest identity (random ID + name)
Data sent to the global leaderboard (Supabase)
Display name (username or Guest_NNNN) · Best completion time · Difficulty · Optional: your country · If signed in: your email address
Authentication
Sign-in uses Supabase magic links (email OTP). Your email is stored securely by Supabase and is never shared or sold.
Deleting your data
Clear your browser's localStorage to remove all local data.
Sign in and use the Account page to delete your leaderboard entry.
Questions? Open an issue on GitHub.