That is a good suggestion, I would like it to run in browser. Unfortunately it is currently difficult to do. The board generation is very computationally intense-which would limit what would be playable in browser. And the game is written in C#-where godot cannot current export to web. There is a way the game could be remade to serve up pre-generated boards, and be playable in browser-but I am not ready to work that out right now.
May happen some day, but not soon.