Swipe in any direction and every tile slides that way. Two of the same picture that meet leave the board. Plan swipes that keep matching pictures next to each other: a line of three pays more than a pair, and scoring on several swipes in a row builds a streak that multiplies the points.
Yes, on your device. There is no account, so progress does not move between devices and is removed if you uninstall the app.
On the map, tap the gear at the top to open Settings. privacy reopens Google’s consent form, where you can change or withdraw your choice. The analytics switch next to it turns usage statistics on or off.
Not in the current version. Coins, hints, extra moves and new worlds all come from playing.