This reminded me of Tim Urban's article about numbers: [From 1 to 1,000,000](https://waitbutwhy.com/2014/11/from-1-to-1000000.html). In that article he has an image with a million tightly packed dots - that should give you an idea of how big this Minesweeper game is!
I was once in Copernic Science Centre (Warsaw, Poland), and they had some cylinders with tiny plastic spheres (imagine 1-2mm diameter each sphere). One of the cylinders was supposed to have 100k? 1m? spheres (or some similarly crazy number) and only 1 red sphere, and I remember I was rotating that cylinder for a couple of minutes (it is not tightly packed to the spheres can move around) and eventually I saw the red sphere.
Ps: on the URL of the parent.. I could not find the red dot.. I gave up after a couple of minutes. I will though try the following (later tonight). Save the image, take it to Photoshop, pick the "black color", use that to erase all the similarly colored (black) dots, and the red one will remain behind for me to easily spot.