Sonic Racing Kart is a mobile phone game released as part of the Sonic Cafe service offered by Sega. In this game, the player controls Sonic, racing around kart courses as fast as possible. It is possible to go online to download time attacks of others to race against, and upload your own. The controls are extremely simple - the kart automatically accelerates so all the player has to do is turn left and right. The game has a sequel called Sonic Kart 3DX.