very addictive and very clean. another minesweeper roguelike i liked was that dragon dungeon one, dont remember it by name. this was great, but you should definitely use that developer's work as inspiration!
by that I mean, you could have more interesting synergies. because right now for me at least it was pretty easy.
by synergies, I mean for example in the other roguelike theres this group of slimes that generate as 8's, but they always spawn in a 3x3 grid surrounding a 1 hp witch, and when you kill her she spawns a revealing thing that reveals all slimes on the map.
your game is more about floor by floor rather than one big board, and ammunition management and stuff, but this could be a source of inspo.
EDIT: i remembered the name, its called DRAGONSWEEPER! check it out.