Re: How do you find card 54? (And griping about 37)
Totally agree about #37. And I think you're right about #54.
I went back and played until I found it.
Spoiler (click to reveal)
It came from the solution to #7, the piano puzzle. Once you solve it, the app tells you to draw 54. My niece had grabbed the phone and put the code in, dismissing the alert somehow.
The app would be improved by having a way to review what cards it has told you to play. Human error interacting with a game app needs a way to recover.