A great implementation of a classic! You did a great job making this exciting, and I appreciated the quality of life improvements like speeding up the explosions during long chains.
As a veteran of the atom wars of the 90s, I found it fairly easy to play against the AI. I'd like it if their moves were a little less random. Also because the board is quite large, it's sometimes quite easy to miss where an AI places its move if no explosions happen. If you're open to it, maybe it'd be nice to colour the square they play in for a moment, much like the player selection cursor?
Very cool, thanks for making this!