The purpose of the game is to control the player (yellow cab) with your iPhone.
An iPad is used as the playfield, if you don't own an iPad you can visit http://cabman.basvk.nl/ to get your free desktop copy.
Play one of the most classic games on your own iPad, PC or MAC. Just download a copy to your iPad and the same game (buy once) on your iPhone or iPod Touch.
Then you're able to use your iPhone as a controller and control the cab visible on your iPad.
For those who don't own an iPad you can download a free copy, see the support URL or click on "game information" in the game's start screen on your iPhone (or iPod Touch).
Ofcourse a Wireless connection is required.
Pick up all the customers (blinking yellow icons) and advance to the next level.