Easily one of my favorite games of all time. I had played it on an emulator for a number of years, and the. I found it at a flea market for $0.50 about 15 years ago and played it on my TG express an absurd amount.
Sad that I sold it (and all my TG stuff), but I have a Miyoo Mini coming soon to hopefully scratch that itch soon.
In my day, I used to sweep for mines when I was bored. It was difficult, and I would often have to guess when I saw large numbers. Anyway, if I got stuck, i would just start playing Solitaire!