There is a small chance of a Jackpot card appearing at the beginning of a Solitaire level

The Jackpot card is real luck because it allows you to win an additional amount of coins! After it appears, it is hidden on the field under other cards

As soon as you find the Jackpot card, it will show you the number of coins you can get if you successfully complete the level

Note that if you lose, you won't get coins from the card.