Just a suggestion, you might want to be more lenient with the answers eg. bent wing for crooked wing, quirrel for prof. quirrel, october 31 for 31st october and 50 pence for fifty pence. Otherwise, nice questions, well-rounded :)
Candy or chocolate should be alternate answers for sweets. And if you accept just the last name Quirrel for one, you shouldn't require "professor" in front of it for the other. In general (unless there's a very good reason not to), you should always accept last names alone for every name in all quizzes.
i said lollies. sadly didn't work. with the present from the dursleys, i typed in "MONEY" but it didn't work. please be more leniet on that one. Also typed in wax (for the bertie botts bean) and it didn't work.
try this quiz:
https://www.jetpunk.com/user-quizzes/2147524/impossible-quiz-harry-potter-and-the-philosophers-stone