Thank you for your comment!
You are right. In the early stages of writing levels, I always completed the level tests by guessing various combinations, but this was extremely inefficient and after a long period of events I gradually built up a decryption technique. But for players who haven’t played for that long, it can be maddening to keep trying. So I’m thinking of adding more interesting mechanics to the game in the future, rather than just using various spins to make up the levels.