游玩L关卡时发现进入绘图模式标记盘面后想退出绘图扫雷游戏会直接闪退，反复尝试几次都是如此。

I think they are 2 new achievements: #' and #' (10 levels in 8x8) How can I fix this? (I've seen that 0% of people has these achievements)

In the regular "map", once you complete enough levels in [#+], you unlock the "credits level", symbolized by a flag. In the [!] "map", once you complete enough levels in [#+!], you unlock a similar level, also symbolized by a flag. Is there such a level in the [!!] map?...

I've unlocked +', but there's a lot of unlocks blocking in single letter primes (like say M') and I can't figure out how I unlock those letters. I've got !, and even !! unlocked, all the combos from 5-8, but still no single letter primes, and no unlocks that point to them. How?...

In Minesweeper 1 when you skip a puzzle in [+] or [#+], the rule combination would be same as the skipped puzzle, means you need to solve at least one puzzle of that rule combination before you can play another combination, which in Minesweeper 2 the rule combination will changes both when completing and skipping puzzle. It does not matter much but I wonder if the game could make the Minesweeper 1 and Minesweeper 2 have the same behavior on skipping puzzle....