Thanks for the compliments! I'm especially happy to hear you like the last unlock - we put some extra effort into that one 🙂
For the trophies, I intentionally left them unexplained as a little bit of a community puzzle - I've seen a lot of users in the Playdate Squad discord decipher a few of them, but I haven't seen anyone record them anywhere!
For the unintuitive puzzles, that's definitely a side effect of being randomly generated! I personally view them as an important part of the game's difficulty curve. Generated puzzles with inefficient solutions tend to be easier and can give players some satisfaction from "outplaying" the game - that's where most of the trophies come from. For extra difficulty, players can demonstrate their mastery of the game by going for an exact solution, which usually requires a thorough understanding of both synergies and antisynergies of each card.
There have been a few custom designed puzzles shared in the Playdate Squad discord, but I haven't seen them anywhere else. It might be fun to see a thread on reddit or other social media!