Boss Battles

You can activate boss battles. While a boss is active, you have a chance of gaining rubies when destroying layers. Obtain enough rubies in the time allotted and you'll beat the boss. There are a total of 8 bosses to beat, each giving a different reward.

You must obtain more rubies than the boss. If you obtain the exact number, you will have to continue getting more rubies until you have at least one more ruby than the boss to win the battle.