Lives (hearts) show how many chances you have to play levels in Hole People.
You start with 5 lives.
Each time you fail a level, you lose 1 life.
Lives refill automatically over time. 1 life every 30 minutes, up to the maximum.
If you run out of lives, you can:
Wait for them to regenerate
Use coins to refill lives
Watch a rewarded ad to get a free extra life
You can always check how many lives you have by looking at the heart icon on the main screen.