I wonder if you could represent the game as a collection of "islands" and render them in WebGL. So, initially the entire field is one island drawn as a single s

I wonder if you could represent the game as a collection of "islands" and render them in WebGL. So, initially the entire field is one island drawn as a single sprite with a repeating texture, then you add a "1" and now you split the island into 5 different such islands having the same texture. It's an also interesting problem to know how many such distinct islands you can actually have, I assume the number mostly depends on the number of mines.