These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
That One Level: Carrying a volatile explosive through the castle's interior, requiring you to make the whole trip without taking damage or jumping. This applies if you're carrying the Nitro, which is the one that requires going the long way around. The Mandragora doesn't have those drawbacks.
Toy Ship: In Carrie's imperfect ending, Malus convinces her to promise to marry him.