I think the UI and core concept are really clever and unique, but admittedly I'm not sure if the deck builder angle for a mystery story works especially well in execution.
Admittedly that might be because I learned I could spam a single card in order to win before I learned the actual rules, but I think the plot might've been more compelling if it had more of an Ace Attorney-style of just having singular conversations which need to be picked apart.
That said, the aesthetic is still fantastic and I might come around on the card game idea if a tutorial and patch for single card spam were to be introduced.