I really like use of theme here for the story and progression! The music is really really good and I like the way it progresses and changes the further you progress! I like the art of the icons of the upgrades and the sly look of the guys handing out the contracts!
I would've like if there was some pitch scaling difference between the sound effects and if there were some advantages to rejecting some contracts, so that it makes you think more about the choice you're making.
overall the game has a fairly polished feel, Well Done! : )