I'm playing this one, and 'til now, I'm still unsure as to why it's grade 7. Does anyone know the key of playing it like a grade 7, or how I can such simple notes sound grade 7ish?

No one.

I'm sorry I don't know the piece so I can only hazard a guess.

Maybe the notes are seemingly simple, but you may have to think about the style and interpretation more. Does it sound better if you use different positions for example??

See http://forums.abrsm.org/index.php?showtopic=4755 .

Why don't you post a recording on the website, and we'll give you our opinions on whether you're playing it at Gr7 level?

since you've done your exam now, I'll be no help! but i had to mention that this title for some, unknown reason beyond the fact it has one of the words in its title reminds me of "Puff the Magic Dragon" sorry...irrelevent