Neopets has a lot of different games, though, so maybe you're thinking of something like:
* Faerie Races: This game involves racing against other Neopets on a colorful track.
* Wheel of Morality: You spin a wheel and try to land on the best possible moral score.
* Tyrannian Tournaments: A series of games with different challenges that you can play to win prizes.
If you can give me more details about the game you're thinking of, I might be able to figure out what it is!