Thanks! I might rework puzzle 0 again then. As for puzzle 12, the solution used to be "NOW WON", and then just "WON". But it felt too predictable and anti-climactic, so I went for a longer message, and couldn't find a suitable semi-palindrome. Do you think just having "WON" would've been better?
My other stuff is definitely not as good (don't expect 10 Puzzles to be comparable), though I am quite happy with how Educated Guess turned out. If you haven't yet, I recommend checking out Linelith and LOK (and Abdec), the inspirations I listed for this game.