Privacy · your call
We'd like to measure speed, frame rate, lag and crashes, and see which features get used, to make the games better. That is first-party only, with no IP addresses kept; ad partners load only if you turn on Advertising. Nothing optional runs until you choose. Policy
Same tiles for both · 250 moves · 3:00 · best score wins
Same tiles duel · practice
You and the ghost play the same tiles at the same time. 250 moves and 3:00 each; the higher score wins.
Seal …
In a real duel you see your opponent's score and moves, never their board. No undo.