Snail Race

Snail Race is an app for the iPod touch, iPhone, and iPad developed by Kooapps.

App Description
In Snail Race, you play as Joe, a snail who is getting bullied at school. He challenges the bully to a snail race. Along the way, he challenges other snails to help him practice for his race. To play, you turn the app sideways, and from there you tap in the bottom corners to move Joe forward.

Usage of Game Center
Snail Race uses game center for multiplayer challenges and a leaderboard.