This a really cool take on the theme. There's a big learning curve, but once you get over it, it's pretty fun!
I think it would better if there was a mock round, (mock trial if you will :P) or super easy round against some really terrible liar to ease you into the game and mechanics.
Also, I appreciate the way you split the tutorial into multiple screens, but each screen is a little too crowded with text. It's okay to have more if they're more concise and straight to the point. ( I understand it's a jam though, so maybe didn't have time)
I also wish there was better art for the cards to make things clearer. Would be cool if there was more backstory and more dialogue after you play each card as well. Adds more flavor. No "Objection!" card as far as I can tell as well, which, as an Ace Attorney fan, is a missed opportunity.
Would be really cool if there a multiplayer option as well!
Overall, really fun game! Hope to see you in more game jams!