Write to support@cypresstech.net. Please include the app name, the version from Settings → About, your phone model and what happened. The full rules are in the app at Settings → How to play.
Easy plays any tile that fits. Normal sheds its heaviest tiles first. Hard also keeps its hand flexible and plays to the numbers it has seen you unable to follow. Choose the level and one to three computer players in Settings.
Play your last tile and you score every pip left in the other hands. If no one can move, the player with the lightest hand scores the difference between each other hand and their own. The first to the target score wins the match (100 unless you change it in Settings).
If nothing in your hand fits either end of the line, you draw from the boneyard until something does. When the boneyard is empty and nothing fits, you pass.
Settings → Remove ads. It is a one-time purchase, not a subscription, and it removes every ad. It does not unlock anything else, because nothing else is locked.
Open Settings → Restore purchase while signed in to the Google account you bought it with. If the price does not show, check that you are online and that Google Play is up to date.
No. The game screen never shows an ad. The free version shows a banner on menu screens and may show one full-screen ad after a game has finished.
Yes. Every part of the game works with no connection. Ads simply do not appear.
Only on your phone. There is no account and no cloud copy, so they do not move to a new phone and are erased if you uninstall.
No. The match is saved after every move. Open the app and tap Continue.
Starting a new game while one is in progress ends the old one and records it as a loss.
Where a consent choice applies to you, Settings → Privacy choices opens the form again.