The number of lives (hearts) indicates how many attempts you have to complete a level. You start the game with the maximum number of five lives. If you purchase the Golden Pass, this increases to eight lives.

• Losing Lives: Each time you fail to complete a level, you lose one life.
• Replenishing Lives: One life is replenished every 30 minutes, allowing you to quickly return to having five lives.

You can check the number of lives you have by looking at the heart icon at the top of the home page. If you don't want to wait 30 minutes, click on the heart-shaped icon on the home page to get more lives.