Interesting. Encourages you to keep more in your memory for sure. Also really slows the game down but I bet that's just practice. In the end tho, it's 100% the same skills as minesweeper. Aside from the novelty, I'd rather play original with flags I suspect. I wonder if there's an extra tweek or two you could add that would make this feel more like a new way to play and less like a new UI design. Maybe if points had some value (reveal mine, protect from death etc).