Surprisingly in depth! I came in thinking it was gonna be an idle Cookie Clicker style game, and it turned out to be a game about math and probability. With a more spruced up presentation, it could very well make for a fun mobile game!
(I do agree with the rest of the comments that the game could use a more intuitive interface, though. Even with the tutorial, it took me around five tries to get what the top and bottom rows mean.)