Email chrishayworth@gmail.com and you will hear back from a real person, usually within a day or two.
Open Settings (the gear on the main menu) and tap the price button under Ads. One $1.99 purchase removes ads forever. If you bought it before and it is not showing, tap Restore Purchases on the same screen.
Tap Hide hints right on a hint, or flip the Hint button switch in Settings any time.
Settings, then Card backs, then My photo. Pick any photo from your library and it becomes the back of every card.
Four players, two teams, 24 cards. One card is turned up; going around the table you can order the dealer to pick it up, making its suit trump. The jack of trump (right bower) is the highest card, the same-color jack (left bower) is second. Follow suit if you can. The calling team needs three of five tricks; all five is a march; falling short is a euchre and the other team scores two. First to ten wins.
Leaderboards and achievements are optional. If you skipped the Game Center sign-in, you can enable it later in the iOS Settings app under Game Center.