I paid the $3 for this game, and got an email showing receipt. But after playing once, it's refusing to let me play again. Did I really pay $3 to play one game? I got that much for free before I bought it!
1/11/19: I am so surprised there are no other reviews but mine. It tells me that most people just deleted the game. It bothers me a lot, because it may be the best mahjong game around. That's why I paid the money for the full version.
After I wrote my first review, (after paying for the full version and not getting it), I was able to play for a few months, but now it has stopped me again, and says I didn't pay.