You deserve 5 start only on the fact you created a functioning card game in 48 hours,the fact the game is actually fun is a great bonus!
Maybe they already had code for a card game framework
This was my first time ever making a card game. I didn't use any existing code, I just kinda had a basic idea in my head how I could implement it. I'm a bit surprised myself that everything went as smoothly as they did.
Well, cheers then)