I'm terrible at minesweeper but I gave it my best shot lol
* INCREDIBLE music but definitely waaaay higher fidelity than a 32 bit console let alone 8 lol. It's like a Jake Kaufman remix album or something.
* Aesthetics are fantastic, it's very polished and juiced to a tee. I think it would work on an NES too minus the volume of the particles.
* The movement of Sweepy was very frustrating (probably due to my playstyle see below)... sometimes I would be pretty sure about one or two but there was no rhyme or reason to the order the car went so I just threw away perfectly good runs on some bomb in the corner of the map. I wish he was a little more predictable, or there was another layer on the game where you plotted the sweeping route. OR maybe he has a limited number of lives that I need to repair, punishing me for playing recklessly and fitting with the rest of the store that I have too much money for.
* I found having to mine the squares with gold on them twice as unintuitive at first. Maybe if the squares looked more like ore that you had to mine? With regular rocks you want to try and put flags there and find they don't work so you try mining them, but with gold squares there's obviously no mine, so it took me a bit to get clued in that it was free money.
* Sometimes I would start a level with 0 flags and not even notice? Not sure if bug
* The mechanical purpose of the rocks/pickaxe didn't really work for me, probably since my playstyle was weird. I was doing a lot of short "just get some guaranteed coin and get out" runs rather than trying to clear the screen, because it's safer for my lives that way and there's no real penalty other than my time. I always had a huge surplus of pickaxes. At worst I'd lose one heart and 2 coin is a pretty measley price especially as the level rewards go up.
* I loved the idea of taking both the mining and sweeping parts of 'minesweeper' and transforming them into something new
* I thought the boss fight was really neat too! Adding a boss to minesweeper is not something I ever thought I'd see in my life but it works lol.
Great entry!