Very interesting concept of having to (quite literally) earn the "reward."
A lot of potential here, I would recommend the following:
-More color (in terms of the computer)
-The vehicle doesn't really seem necessary, you can easily walk between both buildings, and the car doesn't seem to be any faster. You could get rid of it entirely and it wouldn't make a difference to the gameplay. You could also add to it, maybe make an overworld map or something.
-More interaction. More rewards, maybe methods of obtaining money?
-Speaking of money, perhaps a stat system that influences actions and money payout for jobs? (I would recommend taking a look at NewGrounds Sim by Afro_Ninja, he pulls off a simulator pretty well, you could learn from this, I reckon.)
-Graphics aren't horrible, but the contrast between art styles feels a bit awkward. However you want to do it, though. I don't think people really care about the primary gameplay graphics as long as the "rewards" are fairly decent. However, I will say that the girl's face seems rather... neutral.
-More characters, preferably with actual names.
Like I said, quite a bit of potential, if you intend to continue developing.
And I hope you do. Without any more additions, there's nothing to really do. You can easily change that, though.
Here's hoping for the best.