This is awesome! I was a pretty serious (classic) minesweeper player and was even ranked pretty highly internationally. Curious: did other people have their intuition translate "incorrectly" at first? I kept on blowing up cells because I hadn't yet fully internalized the changes that occur in 3D (I know the rules are the same, but the "pattern recognition rules" are not quite the same.) It was really interesting having to step back and rework out the implications of things in 3D. In some vague sense I feel like this is a bit like how some mathematical theorems hold in certain number of dimensions but not others (e.g. random walks). Cool game!