Double Fever Mode

Double Fever Mode is a short-term game state that doubles the rewards from the features listed in its pop-up.

Each Double Fever Mode can be different. For example, one might offer 2X points for Tournaments, while another might not have this perk but instead give 2X Party Bubbles. Some can have them both and lots of other perks. 

Another version with different actions:

When the timer runs out and Double Fever Mode ends, you can extend it using cash. The cost to extend will increase each time you extend. There is a limit to how many times you can extend it, so keep in mind that after a few extensions, you won't be able to extend it anymore for that one.

Double Fever Mode is given as a reward through different features like the Cooking Frenzy and Sweet Rush.