1 basic ad and 1 reward ad per match

But most of them are 5-second ads, so they're watchable. You can get the 20 hidden quest ads from the coin reward ads that appear after a match, or from the roulette or free coin ads on the main screen. Quest times are short, which is nice, and it's great for casual play. The thrill of continuously placing pieces and making them disappear in one go is good.