Incorrectly numbered boxes.
I did mostly enjoy the game except that I've ran into numerous instances of a square having more bombs around it then it's numbered as (ex. says 1 but has 2 bombs around it). That's actually why I've undownload the app as it was so very annoying trying to play and losing when I wouldn't have had the boxes shown the corrext number. I hope this gets fixed because other that this it's an enjoyable game.