I think the puzzles are mostly fine, with a couple exceptions.
1. You should add some form of tutorial about the changing poses. (I solved both paths without knowing that could be done, so I thought the doll head was INCREDIBLY unfair, and I guessed the word with only 3 letters)
2. For the "Solve the equation" card it should be more clear that Kari is not expecting you to enter a number. It would have been in my first 10 guesses, if I didn't spend roughly 40 guesses entering various numbers.