...it's good...but not great
Not bad for a simple quiz flash, but that's not really saying much, considering how little effort you need to make a point and click thing...at least compared to other productions... but then I'm a little fluent in Flash, so take it or leave it.
As for the content, itself, I can't say it's too accurate (For one, you got "Santa's Little Helper" wrong), and some questions don't really have accurate answers. And as to Homer's weight (which you had a question for, twice!) fluctuates throughout the series, making it something (amongst other things) that depends on the season.
All I can say is that yes, you probably do some research before you do something like this, make sure that all of the text is readable, and have some sort of reward, if you win.
...otherwise there's really nothing to it...