The object of the game is to buy a car and a villa in a maximum short period of time. Also, I guess, the objective is to get yourself in the hall of fame - to be recorded there you must have a rating sufficient for that. You are recorded as a hero when you press on the 'Quit' (F10) menu item. Then your current game will end.
Depending on your financial position and your property you can get a job with more or less high salary. Every month you might draw different salary depending on the current game skill level and chance factor.