Oooh, a tarot test deck. But I don't like the 80% fail rate. It does drive a more frantic story.
I'm gonna need a hint on what kind of complication this game would require. I'm still not accustomed to the idea.
Most of the time the "fails" would be success with complications, I believe. A "fail forward" approach. And example success with a complication would be if you tried to sneak by a guard, you would succeed but as you close the door quietly behind you there is a soft click and you realize you are on the wrong side of a locked door. Getting back out may not be as easy as getting in...