A taxi driver makes money after delivering his customer to their destination. Thus, they make more money if they can do the job as fast as they can since they can get more customers in a day. In this game, you don't need to drive your taxi around the city and make money. You just need to properly park your taxi as quick as you can. There are no time limits, but your score will be better if you can do it early. However, saying that and doing it is not what is seems to be. You will only find out if you play the game.