Good, just one problem
When the area is full of mines, 0's, 1's, and 2's are a cheap way to lose lives. I'm not sure how to fix it, but perhaps let you change or save the numbers for a later time, or perhaps have them get rid of another random mine for each number that passes 0. I don't know, but it makes the game unfun when it's only a matter of time before those 0's creep up and beat me.