This is a tower defense game played with playing cards, where defensive cards are used to eliminate attacking cards and receive score rewards.
1. Select one defensive card from the randomly obtained queue to eliminate the attacking card and obtain the corresponding score.
2. The defensive card is larger than the offensive card, and with the same number and spend as the offensive card, it will receive corresponding scores.
3. If the score is greater than or equal to the score specified for that level, you can proceed to the next level.