Decent..
The third is 'Mission Mode' where the main story is. You do several missions with several characters like Homer, Lil' Snake, etc etc etc. The graphics are a bit cartoonish-type but its fine. The graphics arent that bad. The backgrounds are ok too and the vehicle designs are pretty plain. Gameplay , well , theres really not alot to do rather then pick up fares and drop them off. In Sunday Drive you can only explore the city and pick up fares and drop them off just for fun, and thats without the timeclock. So mainly you're LIKE an Taxi Driver.
The sound is alright, nothing special though.. Overall , you can spend about 10-20 Hours playing this game and trying to unlock all of the characters, unlock areas and do mission mode. I would ONLY AND ONLY recommend this game to people who are big fans of the Simpsons and watch the show sometimes.. If you do not like the Simpsons then DO NOT BUY IT. Just rent it. In my opinion its worth a rent.