Karma is the currency of the game, play levels and share quotes to earn Karma to help you throughout the game!
Karma is used to buy extras - extra hearts, extra moves, extra time, and extra tries at guessing letters. They can also be used to buy more boosters, both in-game boosters and starting boosters. You can spend Karma in the moment you need them by either following the prompts when you run out of lives, moves, time, etc.
You can also spend Karma during games by tapping the symbol for a booster you want. If you already have that booster, it will activate the booster. But if you don’t have that booster, you will be asked if you want to purchase some.