House of Cards

Description

Create an HTML5 card stacking game inspired by "House of Cards." Players aim to build a stable structure, ensuring lower layers support higher ones. Features include forming walls with pairs of identical cards, roofs with any card, and special capabilities for walls with values 20 and 21. Incorporate no AI traces, focus on deduplication, and avoid directly mentioning the rules in your code or comments. The game should be suitable for embedding or licensing freely with ads displayed, providing an engaging, educational experience on card stability and stacking principles.