Stupid bonus game: get 4 of same color gem and get a bonus. So it was a simple & fast milestone based bonus game. 4 Blue gems gave mostly 2 to 3 wild columns; 4 Red gems gave mostly 3 to 5 wild cells; and, 4 Yellow gems turn a targeted cell into expanding wild cells (typically into 6 or 9 wilds cells).

Within 1 month, the Red Gems by themselves were unplayable. Then Yellow gems were unplayable.

When I first mapped the game, any 2 set of 2 gems was a play. And in the bonus round, you pick 2 free games out of three choices (normally, I would choose the middle one).

So you go from making $1K a night on this game to maybe $100 if you got lucky. People still vulture this game if most of the gems are filled because you can get two or three bonuses at the same time, which can pay 50X your bet. You had to get the Lady and 5-line winners to max winnings.

Stupid game. Little or no information asymmetry and lots of vultures. So not surprise it was nerfed after 1 month.