some questions: how long lasts the carreer mode ( 10 hours ?) are there problems with itouch 1.g 3.0 jailbroken?
career mode lasts as long as you play really. There are 2 championships for each car type so 8 championships. Each one has three levels so 24 championships just to complete. But you can always redo some to improve times and stuff. Plus the A can be tough so it depends how good you are at the game.
Career mode - certainly not 10 hours. More like 2 hours. You shouldn't have an problems from running it on a jailbroken 3.0 1st gen Touch - I play it on my jailbroken 3.0 original iPhone and it runs fine. However you may experience a bit of lag because it is a 1st gen Touch. But if there is any lag it shouldn't be too noticable as I think that Firemint have taken care to make the game run as smoothly as possible on all devices.