I actually just Kickstarted a card game I made for Itch! Over the summer I made a print-n-play game called Tiny Swords. It did well enough that I decided to expand it and now it's getting printed as a real-deal game! Not only that, but I got double the funding I asked for, which means I can do a WAY larger print run than I originally planned.
As for the game itself, Tiny Swords is a pocket-sized spin on Rock-Paper-Scissors. In it, players try to find and remove their opponent's Sword Cards. To do that, players engage in a Duel, a game of RPS using a card with a Duel Type on it (the square, triangle, and circle shapes above). Whatever cards get used during a Duel stay revealed, and whoever wins the Duel gets to attack their opponent's hand first. Players take turns picking and revealing each other's cards until someone finds a Sword Card. Tiny Swords are made of Blades and Hilts (which can be used as extra Duel Cards in a pinch), and Charms, which all have different game-changing powers. Some even activate when they're removed from the game, like a trap card! I started with 4 swords, but the final game on Kickstarter has 20 swords, each with their own Blade, Hilt, and Charm. I also wrote a ton of extra game modes, so people can play in tag-team with 4 people and other cool stuff. It's been super fun to make, and I'm really excited to see the final boxed game.