From the itch.io page:
52 Fates is a unique, easy to play tabletop RPG system that uses a single, standard 52-card deck for all game mechanics. Two character classes (fighter and mage), diverse backgrounds for unique characters, four magic types, low hit points, and interesting strategic play options make this an unique proposition among tabletop role-playing games. Just get a deck of cards, papers and pencils to keep track of game events, and you’re ready to go!
52 Fates frees players from the uncontrolled, random results of throwing dice, as they need to make conscious choices on which cards to use, when to use them, which cards to save for later, and how many cards to use in a certain play. This adds a deep layer of player agency and strategic thinking. It brings a completely new type of play where the player has some level of control over a character’s fate that goes beyond role-playing decisions.
You can adapt existing OSR adventures relatively easy with the included guidelines and creature codex, plus it also contains guidelines on how to create new adventures.