Hard questions...
They're tricky, and I'm a Simpsons fan. I was mainly disappointed that you only focus on one season - the rest was reasonably well done. Liked Homer in the bottom corner.
Perhaps re-edit this with buttons instead of just clicking on text, and add a 'campaign' where you go through several seasons, rather than just the lesser known first one. Maybe some different questions on each episode, which would up the replay value. Could give the player a title depending on how he did, rather than just a percentage. Also, giving the answer to the questions always helps ;-)
Nice job though, enjoyed it.