Tiles are far too small and difficult to differentiate, making this more of squinting game than an actual mah jong game.... Too bad, cuz in so many ways it's very cool. If you have eagle eyes, you'll enjoy it!
Game plays great and I experienced none of the problems with seeing the tiles. However, the game does have flaws. Most notably the ability to go backwards or take back a move. Without that, you can't figure out what you did wrong and solve the puzzle. You just have to start over. One puzzle I've been working at for over 200 tries!