I enjoyed this a whole lot! The sound effects were nice, and the pictures were a nice addition! You stated it was meant for 9 and up, and the pictures definitely add to the kid- friendly vibe.
The plot and puzzles were nice and straightforward. Your basic get rid of the dragon story.
My one complaint was it was a bit buggy. When trying to buy the box from the little man, I said "yes", answering the npc's question about wanting to buy the box, and instead I am whisked away to the abandoned inn, dropping all my items. A quick undo fixed this, but that was interesting.
After building the glider, the screw driver broke. I typed "fix", trying to see if that would work, and instead it calls my singing abominable. That doesn't sound like a normal outcome for that verb.
Overall, the bugs didn't detract from my enjoyment of the game, you have a nice little adventure here.