Include a "colorblind" option. I enjoy playing match 3 games, and this one certainly seems enjoyable when I play the first couple of levels....EXCEPT, I can't tell the difference between the green (?) and yellow (?) bubbles, which turns it into kind of a random process. I've got a few Match 3 games that work for me without a colorblind option, and a few where a colorblind option is included (thanks, developers!). Also have a bunch that I had to give up on since they became impossible to play at some point in the game play. (I do think my wife will enjoy this one, though.)