I'm amazed that you managed to make a Minesweeper Roguelike work. The gameplay was very smooth, although I would have appreciated a handful of sounds for when you correctly or incorrectly click on tiles. I was also brutalized by the first boss: I got the pop-up boss and that was a NIGHTMARE. Forcing your players to type under stress is not the worst idea, but it completely took me off the game. Could I suggest you instead offer 2 or 3 options to reply with? That way the player will keep using only the mouse and you are still forced to quick-read the pop-ups to know what to click.
Other than that, the game works well and it got me quite hooked. Well done!