1: As it is a design feature that plagues many such games, once you submit your response, you can no longer see your solution. It is not only that you would want to admire it, but when you solved it with more steps than the minimal, you’d want to see your steps to contemplate where you cold make a different step.
2: silly interface problems: some puzzle pack do not get a check mark when they are finished. You are not told when a puzzle pack is completed. “Replay” does not replay anything, it actually means “try again”
3: some perfectly good words are not accepted such as “Greek”.