Not just good... this is a great story. After a generous allowance for house elves being immaculately dressed, it blends wonderfully with canon and has lovely details and funny riddles.
Thank you!
PS. I scrolled down and noticed you edited it... lol. Your writing is good and your thinking in the right way to avoid violating canon and squeezing in between Jo Rowling's blanks. Keep up the good work!
--Annie