Cute concept, but it needs more depth
This is a cute concept for a flash, and I always appreciate a "dress-up game" that doesn't involve nudity to bring in ratings. Unfortunately, aside from the pumpkiny goodness, this flash is a bit lacking.
You had the correct set-up for the stereotypical game of this genre, and I honestly think that was your biggest mistake. When people carve a pumpkin, they prefer that it be a unique reflection of their personality. By giving them pre-determined options, you're making it easier on the designers, but you're also DRASTICALLY limiting their creativity. Being able to design your own eyes, mouths, etc. would be a nice addition, though you'd have to find a way to make sure it didn't just become "MS Paint : The Super Flash Version". Perhaps allowing people to draw an outline of a shape and have the program automatically fill it in.
Your song was generic and forgettable, which is just fine for a short-looped song like that, since it doesn't get stuck in your head. So ... that was actually a compliment.
To sum things up, your flash is, right now, only mediocre. More options, more freedom, and more little pre-made pumpkin shapes would definately help push your score higher.