This isn't a combination of games I expected, but I had a lot of fun with it and I'll definitely be playing this again in the future. I like the pixel art, it's cute and has a soothing palette.
I love the addition of the "?" flag, it's very helpful.
Seconding the request to make "!" flags act as walls, and the request to add alternate palettes. The current colours are lovely, but even though I am not colour blind, I find the field a little hard to read once a lot of numbers and markers are in play.
Edit: Ran into a bug/display issue(?) today. I got this puzzle with a block of 10 mines, but the hint says "9":
