Sonic Xtreme

One of the reasons this game is so fun is because it moves very quickly. If you want to see how quickly you can complete a level, it's possible to blaze through the first and second levels in as little as 15 seconds a piece! Obviously, you won't collect many golden rings going at this pace, but it's fun if you're looking to give yourself a different challenge.

Whether you're speeding through a level or going at a normal pace, you have to keep an eye out for bad guys. While you can get rid of them by using the spacebar to jump on them, running directly into them will cause you to lose a life. You'll also lose a life if you land on spikes.